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    89 Products
    About Threaded Inserts
    industrial info icon

    Choose the right threaded insert for your application and learn how to install it securely.

    Mil.-Spec. Key-Locking Threaded Inserts For Soft Metal

    Image of Product. Bottom orientation. Threaded Inserts. Mil.-Spec. Key-Locking Threaded Inserts For Soft Metal.
    These inserts are manufactured and tested to meet or compare to strict standards adopted by the U.S. military. The keys drive into aluminum and other soft metal for a secure hold that won't slip or rotate, even in vibrating vehicle or aerospace parts. These inserts are comparable to Keensert inserts.
    To install, drill and tap a hole in your material. Then, thread the insert onto the installation tool and screw it into the hole. Place the tool over the keys and hit it with a hammer to drive them in.
    Standard Wall—Stronger than thin-wall inserts, these are your go-to choice for threading most holes.
    Extra-Thick Wall—Stronger than standard- and thin-wall inserts, use them to reduce the size of tapped holes or replace threads that have been drilled out.
    High-Strength Cadmium-Plated Alloy Steel—These inserts have the strength to stand up to high-pressure applications and a plating that helps screws thread in smoothly.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.
    Inserts
    Installation
    Tools
    Thread
    Size
    For Tap Thread
    Size
    Installed
    Lg.
    Drill Bit
    Size
    For Max.
    Hole Dia.
    No. of Locking
    Keys
    Specs. Met
    Each
    Each
    Standard Wall
     
    High-Strength Cadmium-Plated Alloy Steel
    5/8"-11
    		7/8"-14
    		0.875"53/64"
    		0.828"4MS51831A10895101A13400000093904A746000000
    5/8"-18
    		7/8"-14
    		0.875"53/64"
    		0.828"4MS51831A20895101A13500000———0
     
    18-8 Stainless Steel
    5/8"-11
    		7/8"-14
    		0.875"53/64"
    		0.833"4MS51831-10893904A2380000093904A74600000
    5/8"-18
    		7/8"-14
    		0.875"53/64"
    		0.833"4NAS1395C10, MS51831-20893904A24100000———0
    7/8"-14
    		1 1/4"-12
    		1.250"1 3/16"
    		1.192"4MS51831-21093904A24900000———0
     
    Extra-Thick Wall
     
    18-8 Stainless Steel
    9/16"-12
    		7/8"-14
    		0.813"53/64"
    		0.833"4MS51832-10793904A2350000093904A27900000
    9/16"-18
    		7/8"-14
    		0.813"53/64"
    		0.833"4MS51832-20793904A23700000———0
     

    Key-Locking Threaded Inserts for Soft Metal

    Image of Product. Bottom orientation. Threaded Inserts. Key-Locking Threaded Inserts for Soft Metal.
    Add strong threads in soft metal, such as aluminum. The keys on these inserts drive into holes to hold more securely than thread-locking or helical inserts. They prevent slipping and rotating, so they’re stable enough for use in vehicle or aerospace parts that experience heavy vibration. These inserts are comparable to Keensert inserts.
    To install, drill and tap a hole in your material. Then, thread the insert onto the installation tool and screw it into the hole. Place the tool over the keys and hit it with a hammer to drive them in.
    Standard Wall—Stronger than thin-wall inserts, these are your go-to choice for threading most holes.
    Extra-Thick Wall—Stronger than standard- and thin-wall inserts, use them to reduce the size of tapped holes or replace threads that have been drilled out.
    Black Phosphate-Coated Steel—These inserts resist occasional moisture.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.
    High-Strength High-Temperature A286 Stainless Steel—High temperatures won't reduce the load capacity of these inserts. They also resist chemicals such as bleach and chlorine.
    Inserts
    Installation
    Tools
    Inserts with
    Installation Tools
    Thread
    Size
    For Tap Thread
    Size
    Installed
    Lg.
    Drill Bit
    Size
    For Max.
    Hole Dia.
    No. of Locking
    Keys
    Specs. Met
    Each
    Each
    No. of Inserts
    Included
    Each
    Standard Wall
     
    Black Phosphate-Coated Steel
    5/8"-11
    		7/8"-14
    		0.875"53/64"
    		0.828"4—90245A0380000092100A731000000390245A018000000
    5/8"-18
    		7/8"-14
    		0.875"53/64"
    		0.828"4—90245A078000092100A73100000390245A05800000
    7/8"-14
    		1 1/4"-12
    		1.250"1 3/16"
    		1.188"4—90245A0810000092100A73900000390245A06100000
    M14 x 2 mm7/8"-14
    		0.810"53/64"
    		0.828"4—90699A3300000090699A56500000390699A13000000
     
    18-8 Stainless Steel
    5/8"-11
    		7/8"-14
    		0.875"53/64"
    		0.828"4—91731A0580000092100A73100000391731A01800000
    5/8"-18
    		7/8"-14
    		0.875"53/64"
    		0.828"4—91731A0680000092100A73100000391731A07000000
    7/8"-14
    		1 1/4"-12
    		1.250"1 3/16"
    		1.188"4—91731A0790000092100A73900000————0
    M14 x 2 mm7/8"-14
    		0.810"53/64"
    		0.828"4—93930A2140000090699A56500000————0
     
    High-Strength High-Temperature A286 Stainless Steel
    5/8"-18
    		7/8"-14
    		0.875"53/64"
    		0.828"4MS51831CA20893509A32000000———0————0
     
    Extra-Thick Wall
     
    Black Phosphate-Coated Steel
    1/2"-13
    		7/8"-14
    		0.688"53/64"
    		0.828"4—93302A1600000093302A26000000493302A440000000
    1/2"-20
    		7/8"-14
    		0.688"53/64"
    		0.828"4—93302A5700000093302A26000000————0
    9/16"-12
    		7/8"-14
    		0.813"53/64"
    		0.828"4—93302A5800000093302A72000000————0
     
    18-8 Stainless Steel
    1/2"-13
    		7/8"-14
    		0.688"53/64"
    		0.828"4—93340A8240000093302A26000000————0
    1/2"-20
    		7/8"-14
    		0.688"53/64"
    		0.828"4—93340A8250000093302A26000000————0
     

    Helical Threaded Insert Removal Tools

    Image of Product. Front orientation. Threaded Insert Removal Tools. Helical Threaded Insert Removal Tools.
    To remove installed helical inserts, place the tip of these tools into the insert and lightly strike the tool’s head. Then, turn the tool counterclockwise with pressure to extract the insert.
    Narrow Profile—The tip of these tools has a narrower angle than standard removal tools to reduce the chance it will dig into your material’s surface when you strike the tool.
    For Thread Size
    Mfr.
    Each
    Standard Profile
    6-32, 6-40, 8-32, 8-36, 10-24, 10-32, 12-24, 1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20, 9/16"-12, 9/16"-18, 5/8"-11, 5/8"-18, 3/4"-10, 3/4"-16, 7/8"-9, 7/8"-14, 1"-8, 1"-12, 1"-14, M4, M5, M6, M7, M8, M9, M10, M12, M13, M14, M15, M16, M18, M20, M22, M24
    		—90254A113000000
     
    Narrow Profile
    7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20, 1/2"-28, 9/16"-12, 9/16"-18, 5/8"-11, 5/8"-18, 5/8"-24, 3/4"-10, 3/4"-16, 3/4"-20, 7/8"-9, 7/8"-14, 7/8"-20, 1"-8, 1"-12, 1"-14, M12, M14, M16, M18, M20, M22, M24
    		Heli-Coil90254A33000000
     

    Key-Locking Threaded Insert Assortments with Installation Tools

    Image of Product. Front orientation. Threaded Inserts. Key-Locking Threaded Insert Assortments with Installation Tools.
    What you need to add or repair a range of thread sizes in soft metal, such as aluminum. These assortments include multiple key-locking inserts of each size and an installation tool. They're comparable to Keensert inserts.
    Standard Wall—Stronger than thin-wall inserts, these are your go-to choice for threading most holes.
    Black Phosphate-Coated Steel—These inserts resist occasional moisture.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.
    No. of Inserts
    Included
    Includes
    Thread
    Spacing
    For Tap Thread Size
    Drill Bit Size
    For Max. Hole Dia.
    Each
    Standard Wall
     
    Black Phosphate-Coated Steel
    771"-12 Thread × 1 3/8" Installed Lg. (2 Each)
    1/2"-20 Thread × 5/8" Installed Lg. (6 Each)
    1/4"-28 Thread × 3/8" Installed Lg. (20 Each)
    3/4"-16 Thread × 1 1/8" Installed Lg. (3 Each)
    3/8"-24 Thread × 1/2" Installed Lg. (10 Each)
    5/16"-24 Thread × 0.438" Installed Lg. (15 Each)
    5/8"-18 Thread × 7/8" Installed Lg. (3 Each)
    7/16"-20 Thread × 5/8" Installed Lg. (10 Each)
    7/8"-14 Thread × 1 1/4" Installed Lg. (3 Each)
    9/16"-18 Thread × 0.813" Installed Lg. (5 Each)
    Installation Tool    		Fine
    		7/16"-14
    1/2"-13
    9/16"-12
    5/8"-11
    3/4"-16
    7/8"-14
    1 1/8"-12
    1 1/4"-12
    1 3/8"-12
    		29/64"
    33/64"
    37/64"
    45/64"
    53/64"
    1 1/16"
    1 3/16"
    1 5/16"
    X
    		0.397"
    0.453"
    0.516"
    0.578"
    0.703"
    0.828"
    1.063"
    1.186"
    1.313"    		90284A2150000000
    771"-8 Thread × 1 3/8" Installed Lg. (2 Each)
    1/2"-13 Thread × 5/8" Installed Lg. (6 Each)
    1/4"-20 Thread × 3/8" Installed Lg. (20 Each)
    3/4"-10 Thread × 1 1/8" Installed Lg. (3 Each)
    3/8"-16 Thread × 1/2" Installed Lg. (10 Each)
    5/16"-18 Thread × 0.438" Installed Lg. (15 Each)
    5/8"-11 Thread × 7/8" Installed Lg. (3 Each)
    7/16"-14 Thread × 5/8" Installed Lg. (10 Each)
    7/8"-9 Thread × 1 1/4" Installed Lg. (3 Each)
    9/16"-12 Thread × 0.813" Installed Lg. (5 Each)
    Installation Tool    		Coarse
    		7/16"-14
    1/2"-13
    9/16"-12
    5/8"-11
    3/4"-16
    7/8"-14
    1 1/8"-12
    1 1/4"-12
    1 3/8"-12
    		29/64"
    33/64"
    37/64"
    45/64"
    53/64"
    1 1/16"
    1 3/16"
    1 5/16"
    X
    		0.397"
    0.453"
    0.516"
    0.578"
    0.703"
    0.828"
    1.063"
    1.186"
    1.313"    		90284A211000000
     
    18-8 Stainless Steel
    771"-12 Thread × 1 3/8" Installed Lg. (2 Each)
    1/2"-20 Thread × 5/8" Installed Lg. (6 Each)
    1/4"-28 Thread × 3/8" Installed Lg. (20 Each)
    3/4"-16 Thread × 1 1/8" Installed Lg. (3 Each)
    3/8"-24 Thread × 1/2" Installed Lg. (10 Each)
    5/16"-24 Thread × 0.438" Installed Lg. (15 Each)
    5/8"-18 Thread × 7/8" Installed Lg. (3 Each)
    7/16"-20 Thread × 5/8" Installed Lg. (10 Each)
    7/8"-14 Thread × 1 1/4" Installed Lg. (3 Each)
    9/16"-18 Thread × 0.813" Installed Lg. (5 Each)
    Installation Tool    		Fine
    		7/16"-14
    1/2"-13
    9/16"-12
    5/8"-11
    3/4"-16
    7/8"-14
    1 1/8"-12
    1 1/4"-12
    1 3/8"-12
    		29/64"
    33/64"
    37/64"
    45/64"
    53/64"
    1 1/16"
    1 3/16"
    1 5/16"
    X
    		0.397"
    0.453"
    0.516"
    0.578"
    0.703"
    0.828"
    1.063"
    1.186"
    1.313"    		90284A415000000
    771"-8 Thread × 1 3/8" Installed Lg. (2 Each)
    1/2"-13 Thread × 5/8" Installed Lg. (6 Each)
    1/4"-20 Thread × 3/8" Installed Lg. (20 Each)
    3/4"-10 Thread × 1 1/8" Installed Lg. (3 Each)
    3/8"-16 Thread × 1/2" Installed Lg. (10 Each)
    5/16"-18 Thread × 0.438" Installed Lg. (15 Each)
    5/8"-11 Thread × 7/8" Installed Lg. (3 Each)
    7/16"-14 Thread × 5/8" Installed Lg. (10 Each)
    7/8"-9 Thread × 1 1/4" Installed Lg. (3 Each)
    9/16"-12 Thread × 0.813" Installed Lg. (5 Each)
    Installation Tool    		Coarse
    		7/16"-14
    1/2"-13
    9/16"-12
    5/8"-11
    3/4"-16
    7/8"-14
    1 1/8"-12
    1 1/4"-12
    1 3/8"-12
    		29/64"
    33/64"
    37/64"
    45/64"
    53/64"
    1 1/16"
    1 3/16"
    1 5/16"
    X
    		0.397"
    0.453"
    0.516"
    0.578"
    0.703"
    0.828"
    1.063"
    1.186"
    1.313"    		90284A411000000
     

    Key-Locking Threaded Insert Drivers

    Image of Product. Front orientation. Threaded Insert Installation Tools. Key-Locking Threaded Insert Drivers.
    Place the tip of these tools into a key-locking insert after you've threaded it into a hole with your fingers. Then, strike these tools with a hammer to drive the keys into the material and secure the insert. They’re compatible with Keensert inserts.
    Choose the tool that matches your insert’s thread size and tap thread size.
    For Thread Size
    For Tap Thread
    Size
    Handle
    Style
    Each
    Standard (UN) Thread
     
    For Thick-Wall Inserts
    5/8"-11, 5/8"-187/8"-14
    		Straight92100A731000000
    7/8"-9, 7/8"-141 1/4"-12
    		Straight92100A73900000
     
    For Extra-Thick-Wall Inserts
    1/2"-13
    		7/8"-14
    		Straight93302A26000000
    9/16"-12, 9/16"-187/8"-14
    		Straight93302A72000000
    7/8"-9, 7/8"-141 3/8"-12
    		Straight93302A73000000
     
    Metric Thread
     
    For Thick-Wall Inserts
    M14
    		7/8"-14
    		Straight90699A56500000
     

    Key-Locking Threaded Insert Installation Tools

    Image of Product. Front orientation. Threaded Insert Installation Tools. Key-Locking Threaded Insert Installation Tools, Style A.
    Image of Product. Front orientation. Threaded Insert Installation Tools. Key-Locking Threaded Insert Installation Tools, Style D.

    Style A

    Style D

    Thread inserts and drive down their keys with a single tool. These tools are compatible with Keensert inserts.
    Threaded Insert Installation Tools
    Image of Product. Front orientation. Threaded Insert Installation Tools. Key-Locking Threaded Insert Installation Tools, Style A.

    Style A

    For Thread Size
    For Tap Thread
    Size
    Style
    Features
    Each
    For Thick-Wall Inserts
    5/8"-11, 5/8"-187/8"-14
    		ASlotted End6721N41000000
    7/8"-9, 7/8"-141 1/4"-12
    		ASlotted End6721N4300000
     
    For Extra-Thick-Wall Inserts
    1/2"-13, 1/2"-207/8"-14
    		ASlotted End6721N5800000
    9/16"-12, 9/16"-187/8"-14
    		ASlotted End6721N5900000
    7/8"-9, 7/8"-141 3/8"-12
    		ASlotted End6721N6300000
     
    Threaded Insert Installation Tools with Spring
    Image of Product. Front orientation. Threaded Insert Installation Tools. Key-Locking Threaded Insert Installation Tools, Style D.

    Style D

    The tradespersons’ choice for installing Mil. Spec. inserts. A spring holds the sleeve under tension, so wobbles and jostles don’t interfere with a clean, professional install.
    For Thread Size
    For Tap Thread
    Size
    Style
    Features
    Each
    For Thick-Wall Inserts
    7/16"-14, 7/16"-207/8"-14
    		DSleeve, Slotted End6642N1090000000
    9/16"-12, 9/16"-187/8"-14
    		DSleeve, Slotted End93904A27900000
    5/8"-11, 5/8"-187/8"-14
    		DSleeve, Slotted End93904A74600000
    7/8"-9, 7/8"-141 1/4"-12
    		DSleeve, Slotted End93904A751000000
     

    Key-Locking Threaded Inserts with Installation Tools

    Image of Product. Front orientation. Threaded Inserts. Key-Locking Threaded Inserts with Installation Tools.
    Paired with the right tool for installation, these inserts create strong threads in soft metal, such as aluminum. They have keys that drive into material to prevent inserts from slipping and rotating in the hole.
    Standard Wall—Stronger than thin-wall inserts, these are your go-to choice for threading most holes.
    Extra-Thick Wall—Stronger than standard- and thin-wall inserts, use them to reduce the size of tapped holes or replace threads that have been drilled out.
    Black Phosphate-Coated Steel—These inserts resist occasional moisture.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.
    Thread
    Size
    For Tap Thread
    Size
    Installed
    Lg.
    Drill Bit
    Size
    For Max.
    Hole Dia.
    No. of Locking
    Keys
    No. of Inserts
    Included
    Each
    Standard Wall
     
    Black Phosphate-Coated Steel
    5/8"-11
    		7/8"-14
    		0.875"53/64"
    		0.828"4390245A018000000
    5/8"-18
    		7/8"-14
    		0.875"53/64"
    		0.828"4390245A05800000
    7/8"-14
    		1 1/4"-12
    		1.250"1 3/16"
    		1.188"4390245A06100000
    M14 x 2 mm7/8"-14
    		0.810"53/64"
    		0.828"4390699A13000000
     
    18-8 Stainless Steel
    5/8"-11
    		7/8"-14
    		0.875"53/64"
    		0.828"4391731A01800000
    5/8"-18
    		7/8"-14
    		0.875"53/64"
    		0.828"4391731A07000000
     
    Extra-Thick Wall
     
    Black Phosphate-Coated Steel
    1/2"-13
    		7/8"-14
    		0.688"53/64"
    		0.828"4493302A440000000
     

    Installation Bits for Slotted-Drive Threaded Inserts

    Image of Product. Front orientation. Threaded Insert Installation Tools. Installation Bits for Slotted-Drive Threaded Inserts.
    For fast installation, use these installation bits with power drills and drill presses.
    For Thread
    Size
    Hex Shank
    Size
    Each
    7/8"-9, 7/8"-143/8"94110A230000000

    Thread-Locking Threaded Inserts

    Image of Product. Bottom orientation. Threaded Inserts. Thread-Locking Threaded Inserts.
    With Loctite® adhesive already on the threads, these inserts won’t back out or vibrate loose. The adhesive reaches full strength after 72 hours. Unlike helical inserts, you can install them with a standard drill and tap. However, thread-locking inserts are difficult to remove and reuse.
    After drilling and tapping your hole, install inserts with a wrench or an installation bit. To use a wrench, thread an insert and two hex nuts onto a bolt. Then, grip and turn the top nut to drive into the hole. For slotted inserts, you can drive with a slotted screwdriver instead.
    Standard Wall—Stronger than thin-wall inserts, these are your go-to choice for threading most holes.
    Black Phosphate-Coated Steel—These inserts resist occasional moisture.
    Inserts
    Installation
    Tools
    Thread
    Size
    For Tap Thread
    Size
    Installed
    Lg.
    Drill Bit
    Size
    For Max.
    Hole Dia.
    Drive
    Style
    Pkg.
    Qty.
    Pkg.
    Each
    Standard Wall
     
    Black Phosphate-Coated Steel
    7/8"-14
    		1 1/4"-7
    		1.125"1 7/64"
    		1.109"Slotted
    		190248A09300000094110A230000000
     

    Screw-Locking Seize-Resistant Key-Locking Threaded Inserts for Soft Metal

    Image of Product. Bottom orientation. Threaded Inserts. Screw-Locking Seize-Resistant Key-Locking Threaded Inserts for Soft Metal.
    Create the tightest hold in aluminum and other soft metal without screws sticking. The lubricant on these inserts eases installation, and the irregularly shaped threads won’t let screws back out from vibration. Inserts have keys that drive into material to prevent them from slipping or rotating in the hole.
    To install, drill and tap a hole in your material. Then, thread the insert onto the installation tool and screw it into the hole. Place the tool over the keys and hit it with a hammer to drive them in.
    Standard Wall—Stronger than thin-wall inserts, these are your go-to choice for threading most holes.
    Dry-Film-Lubricated 18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.
    Inserts
    Installation
    Tools
    Thread
    Size
    For Tap Thread
    Size
    Installed
    Lg.
    Drill Bit
    Size
    For Max.
    Hole Dia.
    No. of Locking
    Keys
    Specs. Met
    Each
    Each
    Standard Wall
     
    Dry-Film-Lubricated 18-8 Stainless Steel
    5/8"-11
    		7/8"-14
    		0.875"53/64"
    		0.828"4MS51831-108L97255A14600000093904A746000000
    7/8"-14
    		1 1/4"-12
    		1.375"1 3/16"
    		1.188"4MS51831-210L97255A15200000———0
     

    Helical Threaded Inserts

    Image of Product. Pronged. Bottom orientation. Threaded Inserts. Helical Threaded Inserts, Pronged.

    Pronged

    Restore, reinforce, or create threads in metal. The tough coils on these inserts expand once installed to anchor in a tapped hole. Also known as Heli-Coil inserts, they're often used in engine heads and machinery housings where strong connections are critical. Unlike threadlocking inserts, you can remove and reuse them without them losing their strength.
    Installation requires a drill bit, a helical insert tap, and an installation tool.
    Pronged—The prong attaches to an installation tool for precise control as you drive inserts in. Remove the prong with a punch or break-off tool before inserting a screw.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.
    Inserts
    Through-Hole
    Taps
    Closed-End
    Hole Taps
    Installation
    Tools
    Inserts with
    Installation Tools
    Thread
    Size
    Installed
    Lg.
    Drill Bit
    Size
    For Max.
    Hole Dia.
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    Each
    Each
    Each
    No. of Inserts
    Included
    Each
    Pronged
     
    18-8 Stainless Steel
    7/8"-14
    		0.875"57/64"
    		0.891"MS124664191732A5490000091709A161000000091709A488000000090261A1140000000————0
    7/8"-14
    		1.312"57/64"
    		0.891"MS124704191732A240000091709A16100000091709A48800000090261A114000000691732A3400000000
     
    Extraction Tools
    Remove installed helical inserts.
    For Pronged Helical Inserts—Place the tip into pronged inserts and lightly strike the tool’s head. Then, turn the tool counterclockwise with pressure to extract the insert.
    For Thread Size
    Each
    For Pronged Helical Inserts
    7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20, 1/2"-28, 9/16"-12, 9/16"-18, 5/8"-11, 5/8"-18, 5/8"-24, 3/4"-10, 3/4"-16, 3/4"-20, 7/8"-9, 7/8"-14, 7/8"-20, 1"-8, 1"-12, 1"-14, M12, M14, M16, M18, M20, M22, M24
    		90254A330000000
     

    Steel Socket Nuts

    Image of Product. Front orientation. Socket Nuts. Steel Socket Nuts.
    Also known as Allen nuts, use these with socket head cap screws in recessed holes and tight spaces that don't have enough clearance for a wrench. Tighten them with a 6-point hex key. They can also be used as an insert by pressing or drawing them into nonhardened steel, cast iron, or soft nonferrous metal or by molding them into plastic, ceramic, fiber, and similar materials. Made from alloy steel, they're comparable in strength to Grade 9 bolts.
    Thread
    Size
    OD
    Ht.
    Threading
    Thread
    Dp.
    For Hole
    Dia.
    Hex Key
    Size
    Each
    Alloy Steel
    7/8"-14
    		1.36"1.34"Partially Threaded0.7"1.418"7/8"92067A037000000
     

    Finish-Your-Own Key-Locking Threaded Inserts for Soft Metal

    Image of Product. Bottom orientation. Threaded Inserts. Finish-Your-Own Key-Locking Threaded Inserts for Soft Metal.
    Image of Specification. Side1 orientation. Contains Annotated. Threaded Inserts. Finish-Your-Own Key-Locking Threaded Inserts for Soft Metal.
    Tap the thread size you need into the solid body of these inserts. They’re a great choice when you need a custom combination of internal thread size and external diameter. Use them to repair or add new threads in soft metal, such as aluminum. They can also plug threaded holes without the hassle of welding. Keys on the inserts drive into material to prevent slipping and rotating in the hole.
    To install, drill and tap a hole in your material. Then, thread the insert onto the installation tool and screw it into the hole. Place the tool over the keys and hit it with a hammer to drive them in.
    Black Phosphate-Coated Steel—These inserts resist occasional moisture.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.
    Inserts
    Installation
    Tools
    For Tap Thread
    Size
    Installed
    Lg.
    Max. Tapping
    Dia.
    Drill Bit
    Size
    For Max.
    Hole Dia.
    No. of Locking
    Keys
    Each
    Each
    Standard Profile
     
    Black Phosphate-Coated Steel
    7/8"-14
    		0.875"5/8"53/64"
    		0.828"493774A18000000093741A1800000000
     
    18-8 Stainless Steel
    7/8"-14
    		0.875"5/8"53/64"
    		0.828"493543A1500000093741A180000000
     

    Helical Threaded Inserts with Installation Tools

    Image of Product. Drill Bit, Installation Tool and Through-Hole Tap. Front orientation. Threaded Inserts. Helical Threaded Inserts with Installation Tools, Pronged, Drill Bit, Through-Hole Tap, Installation Tool.

    Drill Bit, Installation Tool

    and Through-Hole Tap

    Quickly restore stripped threads—these inserts come with through-hole taps and installation tools. The tough coils on these inserts expand once installed to anchor in a tapped hole.
    Pronged—The prong attaches to an installation tool for precise control as you drive inserts in. Remove the prong with a punch or break-off tool before inserting a screw.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.
    Thread
    Size
    Installed
    Lg.
    Drill Bit
    Size
    For Max.
    Hole Dia.
    No. of Inserts
    Included
    Includes
    Each
    Pronged
     
    18-8 Stainless Steel
    7/8"-14
    		1.312"57/64"
    		0.891"6Drill Bit
    Installation Tool
    Through-Hole Tap    		91732A3400000000
     

    Helical Insert Taps

    Image of Product. Front orientation. Taps. Helical Insert Taps.
    Match the size of helical inserts so they fit tightly when installed in the hole.
    High-Speed Steel—These taps resist heat and wear to stay sharp.
    Plug Chamfer—Our go-to chamfer type. With a longer taper than a bottoming chamfer, they are easier to turn but won't thread as close the bottom of a hole.
    Bottoming Chamfer—Cut all the way to the bottom of blind holes with taps that have the shortest taper. Since these require the most force to turn, they’re often used to finish holes started by taper- or plug-chamfer taps.
    Drill Bit
    Plug Chamfer
    Bottoming
    Chamfer
    For Insert
    Size
    Thread
    Lg.
    Overall
    Lg.
    For Insert
    Thread Type
    No. of
    Flutes
    Size
    Decimal Size
    Equiv.
    Shank
    Type
    Each
    Each
    High-Speed Steel
     
    Uncoated
    7/8"-14
    		2 1/2"5 1/8"UNF
    		457/64"
    		0.8906"Square91709A161000000091709A4880000000
     

    Self-Aligning Key-Locking Threaded Inserts for Soft Metal

    Image of Product. Bottom orientation. Threaded Inserts. Self-Aligning Key-Locking Threaded Inserts for Soft Metal.
    Align threads with off-center parts. These inserts have floating threads that shift slightly so you can insert screws at a slight angle as you fasten two parts together. They're comparable to Keensert inserts.
    To install, drill and tap a hole in your material. Then, thread the insert onto the installation tool and screw it into the hole. Place the tool over the keys and hit it with a hammer to drive them in.
    Standard Wall—Stronger than thin-wall inserts, these are your go-to choice for threading most holes.
    High-Strength Cadmium-Plated Alloy Steel—These inserts have the strength to stand up to high-pressure applications and a plating that helps screws thread in smoothly.
    Inserts
    Installation
    Tools
    Thread
    Size
    For Tap Thread
    Size
    Installed
    Lg.
    Drill Bit
    Size
    For Max.
    Hole Dia.
    No. of Locking
    Keys
    Each
    Each
    Standard Wall
     
    High-Strength Cadmium-Plated Alloy Steel
    7/16"-14
    		7/8"-14
    		0.688"53/64"
    		0.828"493522A1140000006642N1090000000
    7/16"-20
    		7/8"-14
    		0.688"53/64"
    		0.828"493522A115000006642N109000000
     

    Screw-Locking Helical Threaded Inserts

    Image of Product. Pronged. Bottom orientation. Threaded Inserts. Screw-Locking Helical Threaded Inserts, Pronged.

    Pronged

    The irregularly shaped threads tightly grip screws to prevent them from loosening or backing out under vibration. Use these inserts to create or repair threads in pumps and other machinery that shakes and rattles. Also known as Heli-Coil inserts.
    Installation requires a drill bit, a helical insert tap, and an installation tool.
    Pronged—The prong attaches to an installation tool for precise control as you drive inserts in. Remove the prong with a punch or break-off tool before inserting a screw.
    18-8 Stainless Steel—The choice for wet and outdoor environments, these inserts resist rust and mild chemicals.
    Inserts
    Through-Hole
    Taps
    Closed-End
    Hole Taps
    Installation
    Tools
    Thread
    Size
    Installed
    Lg.
    Drill Bit
    Size
    For Max.
    Hole Dia.
    Specs. Met
    Pkg.
    Qty.
    Pkg.
    Each
    Each
    Each
    Pronged
     
    18-8 Stainless Steel
    7/8"-14
    		0.875"57/64"
    		0.891"NASM21209, MS21209F1410190296A24800000091709A161000000091709A488000000090261A1140000000
    7/8"-14
    		1.312"57/64"
    		0.891"NASM21209, MS21209F1415190296A247000091709A16100000091709A48800000090261A114000000
     

    Key-Locking Threaded Insert Blank Drivers

    Image of Product. Front orientation. Threaded Insert Installation Tools. Key-Locking Threaded Insert Blank Drivers.
    Hand thread an insert blank into a tapped hole before placing the tip of these tools on the insert. Strike the tool with a hammer to drive the keys into your material.
    For Tap Thread
    Size
    Handle
    Style
    Each
    Standard (UN) Thread
    7/8"-14
    		Straight93741A1800000000
     

    Easy-Start Helical Threaded Insert Installation Tools

    These tools compress the diameter of your insert so it fits easily into a tapped hole. They’re the best choice for preventing misaligned or damaged threads—just make sure you have space to turn the crank. Screw or slide an insert onto your tool and drive it between a quarter-turn and half-turn below the surface. Also known as prewinders.
    Threaded Insert Installation Tools with Depth Stop
    Image of Product. Front orientation. Threaded Insert Installation Tools. Easy-Start Helical Threaded Insert Installation Tools, Threaded Insert Installation Tools with Depth Stop, T-Handle.

    T-Handle

    Image of Specification. Prong Slot Drive. Front orientation. ZoomedIn view. Prong Slot Drive Helical Insert Tool. Easy-Start Helical Threaded Insert Installation Tools, Threaded Insert Installation Tools with Depth Stop.
    Image of Specification. Threaded Drive. Front orientation. ZoomedIn view. Threaded Drive Helical Insert Tool. Easy-Start Helical Threaded Insert Installation Tools, Threaded Insert Installation Tools with Depth Stop.

    Prong Slot Drive

    Threaded Drive

    Ensure consistent installation across multiple inserts. Set your desired installation depth, and the stop will prevent you from driving your insert any further.
    Prong Slot Drive Helical Insert Tool—Install both left- and right-hand threaded inserts with any thread pitch. However, these tools don't align the threads like threaded-drive tools, so installation may be more difficult.
    Threaded Drive Helical Insert Tool—These tools align each coil of your insert perfectly with the thread pitch of your tapped hole for easy installation.
    For Thread
    Size
    Mfr.
    Handle
    Style
    Helical Insert
    Tool Drive Type
    For Use With
    Each
    Standard (UN) Thread
    7/8"-14
    		—T-HandleProng SlotHelical Inserts, Screw-Locking Helical Inserts1338N420000000
    7/8"-14
    		Heli-CoilT-HandleThreadedHelical Inserts, Screw-Locking Helical Inserts90261A114000000
     

    Screw-On Caps

    Image of Product. Front orientation. Protective Caps. Screw-On Caps, Polyethylene.
    Image of Product. Front orientation. Protective Caps. Screw-On Caps, Aluminum.

    Polyethylene

    Aluminum

    Thread onto male pipe and fittings for the most secure fit. These caps keep dust, paint, and coatings out of threads and pipe. They also protect from damage during manufacturing, shipping, and storage.
    Polyethylene—These tough caps are hard and wear resistant to hold up against scrapes and gouges.
    Aluminum—Use aluminum caps instead of steel to prevent corrosion from spreading to aluminum pipe and tubing.
    Thread
    Size
    Type
    For
    OD
    Inside
    Ht.
    Flexibility
    Max. Temp.,
    ° F
    Color
    Mil. Spec.
    Pkg.
    Qty.
    Pkg.
    Polyethylene
     
    For Straight-Thread Fittings
    7/8"-14
    		UNF
    		7/8"11/16"Rigid150Red—1001277K29000000
     
    Aluminum
     
    For Straight-Thread Fittings
    7/8"-14
    		UNF
    		7/8"21/32"Rigid650—MIL-C-5501/3503522T1800000
     

    Tube End Weld Nuts

    Image of Product. Bottom orientation. Weld Nuts. Tube End Weld Nuts.
    Image of Product. Bottom orientation. Weld Nuts. Tube End Weld Nuts.
    Weld these nuts into tube ends to attach threaded fittings such as rod ends. The welded connection is stronger than tapping a tube directly. These nuts are often used to link control arms and suspensions. Also known as tube adapters and weldable threaded tube ends.
    For Tube
    Wall Thk.
    Thread
    Size
    Ht.
    Threading
    Thread
    Lg.
    Each
    4130 Alloy Steel
     
    For 1 1/2" OD Tubes
    0.12"7/8"-14
    		2"Fully Threaded2"94640A415000000
    0.25"7/8"-14
    		2"Fully Threaded2"94640A74000000
     
    For 1 3/4" OD Tubes
    0.12"7/8"-14
    		2"Fully Threaded2"94640A78000000
    0.25"7/8"-14
    		2"Fully Threaded2"94640A84000000
     

    Hollow Plugs

    Image of Product. Front orientation. Contains Annotated. Protective Plugs. Hollow Plugs.
    With a hollow construction, these plugs compress for snug fit. Push into threaded and unthreaded holes to mask parts during coating and finishing. When you’re done, grab and pull the flanged edge to remove.
    Vinyl Plastic—Durable to resist ripping or shredding, even with repeated use. They also hold up to oils, mild acids, and solvents.
    For
    ID
    For Thread
    Size
    Ht.
    Max. Temp.,
    ° F
    Color
    Flange
    Dia.
    Pkg.
    Qty.
    Pkg.
    Vinyl Plastic
    0.86"7/8"-14
    		5/8"180Red1 1/8"1009343K1800000
     

    Left-Hand-Thread Tube End Weld Nuts

    Image of Product. Bottom orientation. Weld Nuts. Left-Hand-Thread Tube End Weld Nuts.
    Image of Product. Bottom orientation. Weld Nuts. Left-Hand-Thread Tube End Weld Nuts.
    These weld nuts prevent fasteners from backing out of assemblies that rotate counterclockwise. Their left-hand threads pair with left-hand screws and rods to stop the fastener from loosening as the assembly turns. Weld them to the end of a tube for a stronger connection than tapping the tube directly. Also known as tube adapters and weldable threaded tube ends.
    For Tube
    Wall Thk.
    Thread
    Size
    Ht.
    Threading
    Thread
    Lg.
    Each
    4130 Alloy Steel
     
    For 1 1/2" OD Tubes
    0.25"7/8"-14
    		2"Fully Threaded2"94640A504000000
     
    For 1 3/4" OD Tubes
    0.25"7/8"-14
    		2"Fully Threaded2"94640A60100000
     

    Screw-In Plugs for Pipe and Tubing

    Threaded for the most secure fit on female pipe and fittings. These plugs protect from damage during shipping and storage. They also keep dust, paint, and coatings from blocking holes and threads.
    For Straight-Thread Fittings
    Image of Product. Front orientation. Contains Annotated. Protective Plugs. Screw In, For Round Holes, For Pipe, For Round Shapes, For Straight-Thread Fittings, Polyethylene.

    Polyethylene

    Image of Product. Front orientation. Contains Annotated. Protective Plugs. Screw In, For Round Holes, For Pipe, For Round Shapes, For Straight-Thread Fittings, Aluminum.

    Aluminum

    Polyethylene—A balance of wear and chemical resistance for use in a variety of environments. These plugs withstand scratches and scrapes as well as mild acids, solvents, and chemical cleaners.
    Aluminum—Withstand the highest temperatures of all our pipe and tubing plugs. They’re more wear resistant than plastic but won’t hold up as well to chemicals.
    Thread
    Size
    Type
    For Tube
    OD
    Ht.
    Max. Temp.,
    ° F
    Color
    Pkg.
    Qty.
    Pkg.
    Polyethylene
    7/8"-14
    		UNF
    		—7/16"160Red501277K7500000
     
    Aluminum
    7/8"-14
    		UNF
    		5/8"1/2"650—253438T2400000
     
    For 37° Flared Tube
    Image of Product. Front orientation. Contains Annotated. Protective Plugs. Screw In, For Round Holes, For Pipe, For Round Shapes, For 37° Flared Tube, Polyethylene.

    Polyethylene

    Image of Product. Front orientation. Contains Annotated. Protective Plugs. Screw In, For Round Holes, For Pipe, For Round Shapes, For 37° Flared Tube, Aluminum.

    Aluminum

    Polyethylene—A balance of wear and chemical resistance for use in a variety of environments. These plugs withstand scratches and scrapes as well as mild acids, solvents, and chemical cleaners.
    Aluminum—Withstand the highest temperatures of all our pipe and tubing plugs. They’re more wear resistant than plastic but won’t hold up as well to chemicals.
    Thread
    Size
    Type
    For Tube
    OD
    Ht.
    Max. Temp.,
    ° F
    Color
    Pkg.
    Qty.
    Pkg.
    Polyethylene
    7/8"-14
    		UNF
    		5/8"7/8"150Red1001277K41000000
     
    Aluminum
    7/8"-14
    		UNF
    		5/8"11/16"650—253438T3900000
     

    Hollow Tapered Plugs

    Image of Product. Front orientation. Contains Annotated. Protective Plugs. Hollow Tapered Plugs.
    A hollow construction makes these plugs extra flexible, so they compress for easy installation and a snug fit. The tapered profile fits a range of hole diameters. If you flip the plug over, it can be used as a cap.
    Polyethylene—Convenient and economical. Instead of cleaning and reusing, just toss and grab a new plug.
    For ID
    For Pipe
    Size
    For Thread
    Size
    Ht.
    Max. Temp.,
    ° F
    Color
    Flange
    Dia.
    Pkg.
    Qty.
    Pkg.
    Polyethylene
    3/4" to 0.848"3/4
    		7/8"-14
    		9/16"150Red1"1004491K1600000
     

    Pull-Tab-Release Hollow Plugs

    Image of ProductInUse. Front orientation. Protective Plugs. Pull-Tab-Release Hollow Plugs.
    Image of Product. Front orientation. Contains Annotated. Protective Plugs. Pull-Tab-Release Hollow Plugs.
    Lift and pull the tabs with your fingers for easier removal than other plugs. With a tapered profile, these fit a range of diameters. Use to mask holes from coatings or protect threads during shipping.
    Polyethylene—Convenient and economical. Instead of cleaning and reusing, just toss and grab a new plug.
    For ID
    For Thread
    Size
    Ht.
    Max. Temp.,
    ° F
    Color
    Ring
    Dia.
    Pkg.
    Qty.
    Pkg.
    Polyethylene
    47/64" to 53/64"7/8"-14
    		9/16"150Blue1 1/4"10057935K26000000
     

    Tapered Caps

    Image of Product. Front orientation. Protective Caps. Tapered Caps.
    Don't worry about having the exact size you need on hand. These caps are shaped to fit a range of ODs—just keep pushing on until they're snug. Because they make less contact with the parts they cover, they’re easier to remove than straight caps. In a pinch, you can flip tapered caps over and use them as plugs.
    Polyethylene—Convenient and economical, these flexible caps are one and done. Instead of cleaning and reusing, just toss and grab a new cap.
    For OD
    For Thread
    Size
    Inside
    Ht.
    Flexibility
    Max. Temp.,
    ° F
    Color
    Pkg.
    Qty.
    Pkg.
    Polyethylene
    0.753" to 0.868"7/8"-14
    		5/8"Flexible150Red1004491K2700000
     

    Swivel Leveling Mounts with Threaded Stud

    Image of Product. Without Cushion. Front orientation. Leveling Mounts. Swivel Leveling Mounts with Threaded Stud, Without Cushion.

    Without Cushion

    Image of Product. With Cushion. Front orientation. Leveling Mounts. Swivel Leveling Mounts with Threaded Stud, With Cushion.

    With Cushion

    Keep equipment level on slightly sloped and pitted floors with mounts that have a ball-and-socket joint in the base. For mounting versatility, you can install them in either threaded holes or unthreaded through holes at the bottom of equipment.
    Nickel-Plated Steel Base—With a shiny appearance, these mounts create a finished look. They're best for dry environments since the nickel plating offers minimal corrosion resistance.
    Zinc-Yellow-Chromate-Plated Steel Base—More corrosion resistant than nickel-plated steel, these mounts are suitable for damp environments. However, they won’t hold up to chemical cleaners, high-pressure washdowns, and other harsh conditions like stainless steel can.
    303 Stainless Steel Base—The choice for most wet locations, these mounts can withstand repeated washdowns without corroding. However, they won't hold up to cleaning solutions that contain harsh chemicals like 316 stainless steel can.
    Rubber Cushion—A cushion under the base grips surfaces so vibrating equipment doesn't slide. It also protects floors from scrapes and gouges.
    Without Cushion
    With Rubber Cushion
    Thread
    Size
    Thread
    Lg.
    Swivel Range
    of Motion
    Base
    Dia.
    Cap. per
    Mount, lb.
    Overall
    Ht.
    Each
    Cap. per
    Mount, lb.
    Overall
    Ht.
    Cushion
    Material
    Each
    Nickel-Plated Steel Base and Stud
    7/8"-14
    		4"7.5°4"13,5005 7/8"6111K15900000010,1006"Natural Rubber
    		6111K674000000
     
    Zinc-Yellow-Chromate-Plated Steel Base and Stud
    7/8"-14
    		4"7.5°4"13,5005 7/8"6111K17500000——————0
     
    303 Stainless Steel Base and Stud
    7/8"-14
    		4"7.5°4"—————010,1006"Natural Rubber
    		5546N33000000
     
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