System of Measurement System of Measurement |
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Thread Size Thread Size | Show |
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Material Material |
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For Tap Thread Size For Tap Thread Size |
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Threaded Insert Type Threaded Insert Type |
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Key Locking | Helical |
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Thread Locking |
For Maximum Hole Diameter For Maximum Hole Diameter |
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Thread Direction Thread Direction |
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Right Hand | Left Hand |
For Use In For Use In |
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Key-Locking Insert Wall Style Key-Locking Insert Wall Style |
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Drill Bit Size Drill Bit Size |
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Thread Spacing Thread Spacing |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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For Tap Type For Tap Type |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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End Type End Type |
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Tensile Strength Tensile Strength |
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External Locking Type External Locking Type |
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Passivation Passivation |
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About Durometer Hardness Scales
More
About Nuts, Materials, and Finishes
More
How to Install Key-Locking Inserts
More
How to Install Helical Inserts
More
About Helical Insert Length
More
Alloy 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.
For technical drawings and 3-D models, click on a part number.
Thread Size | OD | Ht. | Threading | Thread Dp. | For Hole Dia. | Hex Key Size | Each | |
Alloy Steel | ||||||||
---|---|---|---|---|---|---|---|---|
7/16"-20 | 0.71" | 0.72" | Partially Threaded | 0.36" | 0.733" | 7/16" | 000000000 | 00000 |
Tube-End Weld Nuts


Weld these nuts to round uncoated metal tubes to attach threaded parts, such as rod ends. Also known as tube adapters and weldable threaded tube ends.
For technical drawings and 3-D models, click on a part number.
For Tube Wall Thick. | Thread Size | Ht. | Threading | Thread Lg. | Each | |
4130 Alloy Steel | ||||||
---|---|---|---|---|---|---|
For 5/8" Tube OD | ||||||
0.058" | 7/16"-20 | 1" | Fully Threaded | 1" | 000000000 | 00000 |
For 3/4" Tube OD | ||||||
0.058" | 7/16"-20 | 1" | Fully Threaded | 1" | 000000000 | 0000 |
0.065" | 7/16"-20 | 1 3/8" | Partially Threaded | 1 1/8" | 000000000 | 0000 |
For 7/8" Tube OD | ||||||
0.058" | 7/16"-20 | 1 3/8" | Partially Threaded | 1 1/8" | 000000000 | 0000 |
0.065" | 7/16"-20 | 1 3/8" | Partially Threaded | 1" | 000000000 | 0000 |
0.083" | 7/16"-20 | 1 1/2" | Partially Threaded | 1 1/8" | 000000000 | 0000 |
For 1" Tube OD | ||||||
0.058" | 7/16"-20 | 1 1/2" | Partially Threaded | 1" | 000000000 | 0000 |
0.065" | 7/16"-20 | 1 1/2" | Partially Threaded | 1" | 000000000 | 0000 |
0.083" | 7/16"-20 | 1 1/2" | Partially Threaded | 1" | 000000000 | 0000 |
0.095" | 7/16"-20 | 1 1/2" | Partially Threaded | 1" | 000000000 | 0000 |
Left-Hand Threaded Tube-End Weld Nuts


Use these tube-end nuts with left-hand threaded fasteners. You can weld them to round uncoated metal tubes to attach threaded parts, such as rod ends. Also known as tube adapters and weldable threaded tube ends.
For technical drawings and 3-D models, click on a part number.
For Tube Wall Thick. | Thread Size | Ht. | Threading | Thread Lg. | Each | |
4130 Alloy Steel | ||||||
---|---|---|---|---|---|---|
For 5/8" Tube OD | ||||||
0.058" | 7/16"-20 | 1" | Fully Threaded | 1" | 000000000 | 00000 |
For 3/4" Tube OD | ||||||
0.058" | 7/16"-20 | 1" | Fully Threaded | 1" | 000000000 | 0000 |
0.065" | 7/16"-20 | 1 3/8" | Partially Threaded | 1 1/8" | 000000000 | 0000 |
For 7/8" Tube OD | ||||||
0.058" | 7/16"-20 | 1 3/8" | Partially Threaded | 1 1/8" | 000000000 | 0000 |
0.065" | 7/16"-20 | 1 3/8" | Partially Threaded | 1" | 000000000 | 0000 |
0.083" | 7/16"-20 | 1 1/2" | Partially Threaded | 1 1/8" | 000000000 | 0000 |
For 1" Tube OD | ||||||
0.065" | 7/16"-20 | 1 1/2" | Partially Threaded | 1" | 000000000 | 0000 |
0.095" | 7/16"-20 | 1 1/2" | Partially Threaded | 1" | 000000000 | 0000 |
Black-Phosphate Steel Key-Locking Inserts

A black-phosphate finish provides mild corrosion resistance. Drive the keys into the surrounding material for a more secure hold than thread-locking inserts. Use them to repair or change threads in soft metals such as aluminum. They’re comparable to Keensert® inserts. Installation requires a drill bit, a standard tap, an installation tool, and a hammer.
Inserts with a thin wall are often used in small holes or near the edge of a workpiece.
Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole with stripped threads.
Inserts with an extra thick wall are stronger than thick- and thin-wall inserts. Use them to reduce the size of tapped holes.
For technical drawings and 3-D models, click on a part number.
Inserts | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Each | Installation Tools | |||||||||
Thread Size | For Tap Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | No. of Locking Keys | 1-9 | 10-Up | Each | ||
Black-Phosphate Steel with Thin Wall | ||||||||||
7/16"-20 | 9/16"-12 | 9/16" | 33/64" | 33/64" | 4 | 000000000 | 00000 | 00000 | 000000000 | 000000 |
Black-Phosphate Steel with Thick Wall | ||||||||||
7/16"-20 | 5/8"-11 | 5/8" | 37/64" | 37/64" | 4 | 000000000 | 0000 | 0000 | 000000000 | 00000 |
Black-Phosphate Steel with Extra Thick Wall | ||||||||||
7/16"-20 | 3/4"-16 | 5/8" | 45/64" | 45/64" | 4 | 000000000 | 00000 | 00000 | 000000000 | 00000 |
18-8 Stainless Steel Key-Locking Inserts

Made of stainless steel, these inserts have good corrosion resistance. Drive the keys into the surrounding material for a more secure hold than thread-locking inserts. Use them to repair or change threads in soft metals such as aluminum. Inserts may be mildly magnetic. They’re comparable to Keensert® inserts. Installation requires a drill bit, a standard tap, an installation tool, and a hammer.
Inserts with a thin wall are often used in small holes or near the edge of a workpiece.
Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole.
Inserts with an extra-thick wall are stronger than thick- and thin-wall inserts. Use them to reduce the size of tapped holes.
For technical drawings and 3-D models, click on a part number.
Inserts | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Each | Installation Tools | |||||||||
Thread Size | For Tap Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | No. of Locking Keys | 1-9 | 10-Up | Each | ||
18-8 Stainless Steel with Thin Wall | ||||||||||
7/16"-20 | 9/16"-12 | 9/16" | 33/64" | 0.516" | 4 | 000000000 | 000000 | 000000 | 000000000 | 000000 |
18-8 Stainless Steel with Thick Wall | ||||||||||
7/16"-20 | 5/8"-11 | 5/8" | 37/64" | 0.578" | 4 | 000000000 | 00000 | 00000 | 000000000 | 00000 |
18-8 Stainless Steel with Extra Thick Wall | ||||||||||
7/16"-20 | 3/4"-16 | 5/8" | 45/64" | 0.703" | 4 | 000000000 | 00000 | 00000 | 000000000 | 00000 |
Mil. Spec. Stainless Steel Key-Locking Inserts

These inserts are made to stringent military specifications. Drive the keys into the surrounding material for a more secure hold than thread-locking inserts. Use them to repair or change threads in soft metals such as aluminum. Inserts may be mildly magnetic. They’re comparable to Keensert® inserts. Installation requires a drill bit, a standard tap, an installation tool, and a hammer.
Inserts with a thin wall are often used in small holes or near the edge of a workpiece.
Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole.
For technical drawings and 3-D models, click on a part number.
Inserts | Installation Tools | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Thread Size | For Tap Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | No. of Locking Keys | Specifications Met | Each | Each | ||
303 Stainless Steel with Thin Wall | ||||||||||
7/16"-20 | 9/16"-12 | 9/16" | 33/64" | 0.521" | 4 | MS51830-205, NAS1394C7 | 000000000 | 00000 | 000000000 | 000000 |
303 Stainless Steel with Thick Wall | ||||||||||
7/16"-20 | 5/8"-11 | 5/8" | 37/64" | 0.583" | 4 | MS51831-205, NAS1395C7 | 000000000 | 0000 | 000000000 | 00000 |
Mil. Spec. Alloy Steel Key-Locking Inserts

The strongest key-locking inserts we offer, these inserts are made to stringent military specifications. Drive the keys into the surrounding material for a more secure hold than thread-locking inserts. Use them to repair or change threads in soft metals such as aluminum. Inserts may be mildly magnetic. They’re comparable to Keensert® inserts. Installation requires a drill bit, a standard tap, an installation tool, and a hammer.
Inserts with a thin wall are often used in small holes or near the edge of a workpiece.
Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole.
For technical drawings and 3-D models, click on a part number.
Inserts | Installation Tools | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Thread Size | For Tap Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | No. of Locking Keys | Specifications Met | Each | Each | ||
Cadmium-Plated Alloy Steel with Thin Wall | ||||||||||
7/16"-20 | 9/16"-12 | 9/16" | 33/64" | 33/64" | 4 | MS51830-A205, NAS1394-7 | 000000000 | 00000 | 000000000 | 000000 |
Cadmium-Plated Alloy Steel with Thick Wall | ||||||||||
7/16"-20 | 5/8"-11 | 5/8" | 37/64" | 37/64" | 4 | MS51831-A205, NAS1395-7 | 000000000 | 0000 | 000000000 | 00000 |
Screw-Locking Key-Locking Inserts


Forming the strongest hold of any of our threaded inserts, these inserts have a distorted internal thread to lock screws into place and keys that drive into surrounding material to prevent slipping and rotating. This creates a mechanical lock, which is stronger than the chemical lock from adhesive on thread-locking inserts. Because they’re made of a solid piece of metal, these inserts are also stronger than helical inserts, which are made of coiled wire. They're often used in molds, tools and dies, and suspension systems in vehicles to create completely new threads, add strong threads in soft metal, or replace existing threads that are damaged or need to be resized.
A dry-film lubricant makes it easy to install them and screw fasteners in. To install, use a tap to create the threads in your material and an installation tool to drive the keys into the material. All are made to tight tolerances with strictly controlled materials. Many inch sizes also meet military or aerospace standards for dimensions and material.
These inserts resist corrosion in wet environments. Cadmium-plated steel inserts are stronger than stainless steel inserts.
Inserts with thin walls are best for small holes or near the edge of a workpiece. They’re often used in electronics that require small fasteners. Inserts with thick walls are most commonly used; they’re stronger than thin-wall inserts and are used in larger holes.
For technical drawings and 3-D models, click on a part number.
Inserts | Installation Tools | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Thread Size | For Tap Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | No. of Locking Keys | Specifications Met | Each | Each | ||
303 Stainless Steel with Thin Wall | ||||||||||
7/16"-20 | 9/16"-12 | 9/16" | 33/64" | 33/64" | 4 | MS51830-205L, NAS1394C7L | 000000000 | 000000 | 000000000 | 000000 |
Cadmium-Plated Steel with Thick Wall | ||||||||||
7/16"-20 | 5/8"-11 | 5/8" | 37/64" | 37/64" | 4 | MS51831-A205L | 000000000 | 00000 | 000000000 | 00000 |
Key-Locking Insert Assortments with Installation Tool

These assortments include various sizes of key-locking inserts with thick and thin walls, and an installation tool. Drive the keys into the surrounding material for a more secure hold than thread-locking inserts. Use them to repair or convert threads in soft metals such as aluminum. They’re comparable to Keensert® inserts.
18-8 stainless steel inserts are more corrosion resistant than black-phosphate steel. They may be mildly magnetic.
Black-phosphate steel inserts are mildly corrosion resistant.
Thin-wall inserts are often used in small holes or near the edge of a workpiece.
Choose assortments with thick-wall inserts for greater strength than thin-wall inserts, or to fill a large hole.
For technical drawings and 3-D models, click on a part number.
For Tap | ||||||
---|---|---|---|---|---|---|
Includes | No. of Inserts Included | Thread Size | Drill Bit Size | For Max. Hole Dia. | Each | |
Inch | ||||||
18-8 Stainless Steel with Thin Wall | ||||||
10-32 Thread × 0.313" Installed Lg. (20 Each) 1/4"-28 Thread × 3/8" Installed Lg. (20 Each) 5/16"-24 Thread × 0.438" Installed Lg. (15 Each) 3/8"-24 Thread × 1/2" Installed Lg. (10 Each) 7/16"-20 Thread × 0.563" Installed Lg. (10 Each) 1/2"-20 Thread × 5/8" Installed Lg. (6 Each) Installation Tool | 81 | 5/16"-18 3/8"-16 7/16"-14 1/2"-13 9/16"-12 5/8"-11 | I Q X 29/64" 33/64" 37/64" | 0.272" 0.332" 0.397" 29/64" 33/64" 37/64" | 000000000 | 0000000 |
18-8 Stainless Steel with Thick Wall | ||||||
1/4"-28 Thread × 3/8" Installed Lg. (20 Each) 5/16"-24 Thread × 0.438" Installed Lg. (15 Each) 3/8"-24 Thread × 1/2" Installed Lg. (10 Each) 7/16"-20 Thread × 5/8" Installed Lg. (10 Each) 1/2"-20 Thread × 5/8" Installed Lg. (6 Each) 9/16"-18 Thread × 0.813" Installed Lg. (5 Each) 5/8"-18 Thread × 7/8" Installed Lg. (3 Each) 3/4"-16 Thread × 1 1/8" Installed Lg. (3 Each) 7/8"-14 Thread × 1 1/4" Installed Lg. (3 Each) 1"-12 Thread × 1 3/8" Installed Lg. (2 Each) Installation Tool | 77 | 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 | X 29/64" 33/64" 37/64" 45/64" 53/64" 1 1/16" 1 3/16" 1 5/16" | 0.397" 29/64" 33/64" 37/64" 45/64" 53/64" 1 1/16" 1 3/16" 1 5/16" | 000000000 | 000000 |
Black-Phosphate Steel with Thin Wall | ||||||
10-32 Thread × 0.313" Installed Lg. (20 Each) 1/4"-28 Thread × 3/8" Installed Lg. (20 Each) 5/16"-24 Thread × 0.438" Installed Lg. (15 Each) 3/8"-24 Thread × 1/2" Installed Lg. (10 Each) 7/16"-20 Thread × 0.563" Installed Lg. (10 Each) 1/2"-20 Thread × 5/8" Installed Lg. (6 Each) Installation Tool | 81 | 5/16"-18 3/8"-16 7/16"-14 1/2"-13 9/16"-12 5/8"-11 | I Q X 29/64" 33/64" 37/64" | 0.272" 0.332" 0.397" 29/64" 33/64" 37/64" | 000000000 | 000000 |
Black-Phosphate Steel with Thick Wall | ||||||
1/4"-28 Thread × 3/8" Installed Lg. (20 Each) 5/16"-24 Thread × 0.438" Installed Lg. (15 Each) 3/8"-24 Thread × 1/2" Installed Lg. (10 Each) 7/16"-20 Thread × 5/8" Installed Lg. (10 Each) 1/2"-20 Thread × 5/8" Installed Lg. (6 Each) 9/16"-18 Thread × 0.813" Installed Lg. (5 Each) 5/8"-18 Thread × 7/8" Installed Lg. (3 Each) 3/4"-16 Thread × 1 1/8" Installed Lg. (3 Each) 7/8"-14 Thread × 1 1/4" Installed Lg. (3 Each) 1"-12 Thread × 1 3/8" Installed Lg. (2 Each) Installation Tool | 77 | 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 | X 29/64" 33/64" 37/64" 45/64" 53/64" 1 1/16" 1 3/16" 1 5/16" | 0.397" 29/64" 33/64" 37/64" 45/64" 53/64" 1 1/16" 1 3/16" 1 5/16" | 000000000 | 000000 |
Key-Locking Inserts with Installation Tool

Drive the keys into the surrounding material for a more secure hold than thread-locking inserts. These inserts are used to repair or convert threads in soft metals such as aluminum. They’re comparable to Keensert® inserts.
18-8 stainless steel inserts are more corrosion resistant than black-phosphate steel. They may be mildly magnetic.
Black-phosphate steel inserts are mildly corrosion resistant.
Inserts with a thin wall are often used in small holes or near the edge of a workpiece.
Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole.
For technical drawings and 3-D models, click on a part number.
Thread Size | For Tap Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | No. of Locking Keys | No. of Inserts Included | Each | |
18-8 Stainless Steel with Thin Wall | ||||||||
---|---|---|---|---|---|---|---|---|
7/16"-20 | 9/16"-12 | 9/16" | 33/64" | 33/64" | 4 | 6 | 000000000 | 000000 |
18-8 Stainless Steel with Thick Wall | ||||||||
7/16"-20 | 5/8"-11 | 5/8" | 37/64" | 37/64" | 4 | 6 | 000000000 | 00000 |
Black-Phosphate Steel with Thin Wall | ||||||||
7/16"-20 | 9/16"-12 | 9/16" | 33/64" | 33/64" | 4 | 6 | 000000000 | 00000 |
Black-Phosphate Steel with Thick Wall | ||||||||
7/16"-20 | 5/8"-11 | 5/8" | 37/64" | 37/64" | 4 | 6 | 000000000 | 00000 |
Stainless Steel Helical Inserts

Also known as Heli-Coil inserts, these inserts have coils that expand once installed to securely anchor the insert. All have a prong for ease of installation. An installation tool grips the prong and reduces the coil diameter, enabling the insert to fit in tapped holes. Remove the prong to insert the screw. Installation requires a drill bit, a helical insert tap, an installation tool, and a prong break-off tool.
For technical drawings and 3-D models, click on a part number.
Inserts | Through-Hole Taps | Closed-End Hole Taps | Installation Tools | Prong Break-Off Tools | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | Specifications Met | Pkg. Qty. | Pkg. | Each | Each | Each | Each | |||||
18-8 Stainless Steel—Right-Hand Threaded | |||||||||||||||
7/16"-20 | 0.438" | 29/64" | 29/64" | MS124-659 | 10 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 0000000 | 000000000 | 0000000 |
7/16"-20 | 0.656" | 29/64" | 29/64" | MS124-699 | 10 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
7/16"-20 | 7/8" | 29/64" | 29/64" | MS124-739 | 5 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
Stainless Steel Screw-Locking Helical Inserts

A distorted thread grips the screw to resist loosening. Also known as Heli-Coil inserts, these inserts have coils that expand once installed to securely anchor the insert. All have a prong for ease of installation. An installation tool grips the prong and reduces the coil diameter, enabling the insert to fit in tapped holes. Remove the prong to insert the screw. Installation requires a drill bit, a helical insert tap, an installation tool, and a prong break-off tool.
For technical drawings and 3-D models, click on a part number.
Inserts | Through-Hole Taps | Closed-End Hole Taps | Installation Tools | Prong Break-Off Tools | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | Specifications Met | Pkg. Qty. | Pkg. | Each | Each | Each | Each | |||||
18-8 Stainless Steel | |||||||||||||||
7/16"-20 | 0.438" | 29/64" | 29/64" | MS21209F7-10, NASM21209 | 5 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 000000 | 000000000 | 0000000 | 000000000 | 0000000 |
7/16"-20 | 0.656" | 29/64" | 29/64" | MS21209F7-15, NASM21209 | 5 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
7/16"-20 | 7/8" | 29/64" | 29/64" | MS21209F7-20, NASM21209 | 1 | 000000000 | 0000 | 000000000 | 00000 | 000000000 | 00000 | 000000000 | 000000 | 000000000 | 000000 |
Helical Inserts with Installation Tools

Inserts come with a through-hole tap and installation tool. Also known as Heli-Coil inserts, they have coils that expand once installed to securely anchor the insert. All have a prong for ease of installation. An installation tool grips the prong and reduces the coil diameter, enabling the insert to fit in tapped holes. Remove the prong to insert the screw.
Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | No. of Inserts Included | Includes | Each | |
18-8 Stainless Steel—Right-Hand Threaded | |||||||
---|---|---|---|---|---|---|---|
7/16"-20 | 0.438" | 29/64" | 29/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 000000 |
7/16"-20 | 0.656" | 29/64" | 29/64" | 10 | Drill Bit, Through-Hole Tap, Installation Tool | 000000000 | 00000 |
Helical Insert Assortments with Installation Tools

Assortments include various sizes of helical inserts and a tap, a drill bit, and an installation tool for each thread size. Also known as Heli-Coil inserts, the inserts have coils that expand once installed to securely anchor the insert. All have a prong for ease of installation. An installation tool grips the prong and reduces the coil diameter, enabling the insert to fit in tapped holes. Remove the prong to insert the screw.
Includes | No. of Inserts Included | Thread Spacing | Drill Bit Size | For Max. Hole Dia. | Each | |
Inch | ||||||
---|---|---|---|---|---|---|
18-8 Stainless Steel | ||||||
Prong Break-Off Tool 7/16"-20 Thread × 0.438" Installed Lg. (6 Each) 7/16"-20 Thread × 0.656" Installed Lg. (6 Each) 7/16"-20 Thread × 7/8" Installed Lg. (6 Each) Drill Bit Through-Hole Tap Installation Tool | 18 | Fine | 29/64" | 29/64" | 000000000 | 000000 |
10-32 Thread × 0.285" Installed Lg. (12 Each) 1/4"-28 Thread × 3/8" Installed Lg. (12 Each) 5/16"-24 Thread × 0.469" Installed Lg. (12 Each) 3/8"-24 Thread × 0.562" Installed Lg. (12 Each) 7/16"-20 Thread × 0.656" Installed Lg. (6 Each) 1/2"-20 Thread × 3/4" Installed Lg. (6 Each) Drill Bits Through-Hole Taps Installation Tools | 60 | Fine | 13/64" 17/64" 21/64" 25/64" 29/64" 33/64" | 13/64" 17/64" 21/64" 25/64" 29/64" 33/64" | 000000000 | 000000 |
Black-Phosphate Steel Easy-to-Install Thread-Locking Inserts
A black-phosphate finish provides mild corrosion resistance. Also known as E-Z Lok, these inserts use Loctite® adhesive to keep them in place. The adhesive reaches full strength after 72 hours. Installation requires a drill bit and a standard tap. Then set the insert with a bolt and two nuts, or use an installation bit.
Inserts with a thin wall are often used in small holes or near the edge of a workpiece.
Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole.
To drive slotted inserts, you can use a slotted screwdriver instead of using an installation bit or a bolt and two nuts.
For technical drawings and 3-D models, click on a part number.


Inserts | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
For Tap | Installation Bits | |||||||||
Thread Size | Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | Drive Style | Pkg. Qty. | Pkg. | Each | ||
Black-Phosphate Steel with Thin Wall | ||||||||||
7/16"-20 | 9/16"-12 | 9/16" | 33/64" | 33/64" | Slotted | 5 | 000000000 | 00000 | 000000000 | 00000 |
Black-Phosphate Steel with Thick Wall | ||||||||||
7/16"-20 | 5/8"-11 | 21/32" | 17/32" | 17/32" | Slotted | 5 | 000000000 | 0000 | 000000000 | 0000 |
18-8 Stainless Steel Easy-to-Install Thread-Locking Inserts
Made of 18-8 stainless steel, these inserts have good corrosion resistance. Also known as E-Z Lok, they use Loctite® adhesive to keep them in place. The adhesive reaches full strength after 72 hours. They may be mildly magnetic. Installation requires a drill bit and a standard tap. Then set the insert with an installation bit, a slotted screwdriver, or a bolt with two nuts.
Inserts with a thin wall are often used in small holes or near the edge of a workpiece.
Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole.
For technical drawings and 3-D models, click on a part number.


Inserts | Installation Bits | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Thread Size | For Tap Thread Size | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | Drive Style | Pkg. Qty. | Pkg. | Each | ||
18-8 Stainless Steel with Thin Wall | ||||||||||
7/16"-20 | 9/16"-18 | 0.563" | 33/64" | 0.5156" | Slotted | 1 | 000000000 | 00000 | 000000000 | 00000 |
18-8 Stainless Steel with Thick Wall | ||||||||||
7/16"-20 | 5/8"-11 | 21/32" | 17/32" | 17/32" | Slotted | 1 | 000000000 | 0000 | 000000000 | 0000 |
Threaded Bumpers

Mount these bumpers on a threaded stud. All are reinforced with a steel core or base plate for strength. Often used as feet, spacers, and vibration dampers, they absorb shock to prevent damage to equipment and surfaces. They're also good for starting and stopping motion on automated machines. All of these bumpers can be used outdoors.
Bumpers with a soft rating offer cushioning.
Bumpers with a medium and medium-soft rating offer a balance of cushioning and impact resistance. The softer the bumper, the more it cushions.
Bumpers with an extra-hard, hard, and medium-hard rating withstand high levels of impact. The harder the bumper, the more impact it withstands.
Buna-N bumpers resist abrasion, oil, and grease.
Neoprene bumpers have good abrasion resistance.
Polyurethane bumpers have better abrasion resistance than neoprene bumpers. They won't become brittle and crack when exposed to ozone.
For technical drawings and 3-D models, click on a part number.


Thread | Each | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Size | Dp. | OD | Ht. | Temp. Range, °F | For Use Outdoors | Hardness Rating | Hardness | Nonmarking | Color | 1-11 | 12-Up | |
Buna-N Rubber with Steel Core | ||||||||||||
7/16"-20 | 1/2" | 1 1/4" | 1 1/4" | -60° to 175° | Yes | Medium Soft | Durometer 40A | Yes | White | 0000000 | 000000 | 000000 |
Neoprene Rubber with Steel Core | ||||||||||||
7/16"-20 | 1/2" | 1 1/4" | 1 1/4" | -40° to 200° | Yes | Hard | Durometer 75A | No | Black | 00000000 | 00000 | 00 |
7/16"-20 | 1/2" | 1 1/4" | 1 1/4" | -40° to 200° | Yes | Medium Soft | Durometer 40A | No | Black | 0000000 | 00000 | 00 |
Polyurethane Rubber with Steel Core | ||||||||||||
7/16"-20 | 1/2" | 1 1/4" | 1 1/4" | -40° to 200° | Yes | Extra Hard | Durometer 95A | No | Black | 00000000 | 00000 | 00 |
7/16"-20 | 1/2" | 1 1/4" | 1 1/4" | -40° to 200° | Yes | Hard | Durometer 85A | No | Red | 0000000 | 00000 | 00 |
7/16"-20 | 1/2" | 1 1/4" | 1 1/4" | -40° to 200° | Yes | Medium | Durometer 50A | No | Red | 00000000 | 00000 | 00 |
7/16"-20 | 1/2" | 1 1/4" | 1 1/4" | -40° to 200° | Yes | Medium Hard | Durometer 60A | No | Black | 00000000 | 00000 | 00 |
7/16"-20 | 1/2" | 1 1/4" | 1 1/4" | -40° to 200° | Yes | Medium Soft | Durometer 40A | No | Red | 000000 | 00000 | 00 |
7/16"-20 | 1/2" | 1 1/4" | 1 1/4" | -40° to 200° | Yes | Soft | Durometer 30A | No | Red | 00000000 | 00000 | 00 |