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    69 Products

    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
     

    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
    0.25"7/8"-14
    		2"Fully Threaded2"94640A740000000
     
    For 1 3/4" OD Tubes
    0.12"7/8"-14
    		2"Fully Threaded2"94640A78000000
    0.25"7/8"-14
    		2"Fully Threaded2"94640A84000000
     

    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
     

    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
     

    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
     

    Threaded Rod Collars

    Image of Product. Front orientation. Threaded Rod Collars. Threaded Rod Collars.
    To install, thread these one-piece collars onto the end of your shaft. They clamp evenly around the shaft to create a strong, mar-free hold. Tighten the clamping screw to secure.
    Black-Oxide 1215 Carbon Steel—Black-oxide steel collars have some corrosion resistance.
    303 Stainless Steel—303 stainless steel collars have excellent corrosion resistance.
    Clamping
    Screw
    Black-Oxide 1215
    Carbon Steel
    303
    Stainless Steel
    For Shaft
    Thread Size
    OD
    Wd.
    Type
    No.
    of
    Each
    Each
    7/8"-14
    		1 5/8"1/2"Socket Head16438K280000006438K89000000

    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
     

    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
     

    Threaded Two-Piece Rod Collars

    Image of Product. Front orientation. Threaded Rod Collars. Threaded Two-Piece Rod Collars.
    Install these collars anywhere on a shaft without removing components or having access to the ends of the shaft. Collars clamp evenly around the shaft to create a strong, mar-free hold. Tighten the clamping screws to secure.
    Black-Oxide 1215 Carbon Steel—Black-oxide steel collars have some corrosion resistance.
    303 Stainless Steel—303 stainless steel collars have excellent corrosion resistance.
    Clamping
    Screw
    Black-Oxide 1215
    Carbon Steel
    303
    Stainless Steel
    For Shaft
    Thread Size
    OD
    Wd.
    Type
    No.
    of
    Each
    Each
    7/8"-14
    		1 5/8"1/2"Socket Head260705K6100000060705K71000000

    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
     

    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
     

    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"MS21209F1410, NASM21209190296A24800000091709A161000000091709A488000000090261A1140000000
    7/8"-14
    		1.312"57/64"
    		0.891"MS21209F1415, NASM21209190296A247000091709A16100000091709A48800000090261A114000000
     

    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
     

    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
     

    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"4MS51831-208, NAS1395C1093904A24100000———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
     
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