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Press-Fit Locknuts for Sheet Metal
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The nylon insert inside these nuts grips screws so they won't back out or loosen. Use them to keep thin parts fastened on engines and other vibrating machinery.
Steel—Best for dry environments since moisture will cause these nuts to rust.
Zinc-Plated Steel—A step up from plain steel, the zinc plating withstands occasional exposure to moisture.
Cadmium Yellow-Chromate-Plated Steel—Thread fasteners on these nuts smoothly without sticking. The plating also creates a stronger barrier against rust than zinc.
18-8 Stainless Steel—The choice for wet and outdoor environments, these nuts resist rust and mild chemicals.
Thread Size | Drill Bit Size | For Min. Panel Thk. | For Maximum Panel Hardness | Head Ht. | Flange Dia. | PEM® Part No. | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
Nylon-Insert Locking | |||||||||||
Steel | |||||||||||
| 4-40 | 5/32" | 0.05" | Brinell 205, Rockwell B95 | 0.09" | 0.2" | — | 10 | 91835A488 | 00000 | ||
| 6-32 | 3/16" | 0.05" | Brinell 205, Rockwell B95 | 0.13" | 0.28" | — | 10 | 91835A490 | 0000 | ||
| 8-32 | 7/32" | 0.05" | Brinell 205, Rockwell B95 | 0.16" | 0.31" | — | 10 | 91835A721 | 0000 | ||
Zinc-Plated Steel | |||||||||||
| M3 x 0.5 mm | 6 mm | 1.5 mm | Brinell 125, Rockwell B70 | 3 mm | 7 mm | PL-M3-ZI | 10 | 91835A102 | 0000 | ||
| M4 x 0.7 mm | 7.5 mm | 1.5 mm | Brinell 125, Rockwell B70 | 4 mm | 8.5 mm | PL-M4-ZI | 10 | 91835A106 | 0000 | ||
| M5 x 0.8 mm | 8 mm | 1.5 mm | Brinell 125, Rockwell B70 | 4 mm | 9 mm | PL-M5-ZI | 10 | 91835A114 | 0000 | ||
Cadmium Yellow-Chromate-Plated Steel | |||||||||||
| 6-32 | 3/16" | 0.05" | Brinell 205, Rockwell B95 | 0.13" | 0.28" | — | 10 | 91835A270 | 0000 | ||
| 10-32 | 1/4" | 0.05" | Brinell 205, Rockwell B95 | 0.18" | 0.34" | — | 10 | 91835A217 | 00000 | ||
18-8 Stainless Steel | |||||||||||
| 2-56 | 1/8" | 0.05" | Brinell 240, Rockwell B100 | 0.08" | 0.17" | — | 10 | 91835A510 | 00000 | ||
| 4-40 | 5/32" | 0.05" | Brinell 205, Rockwell B95 | 0.09" | 0.2" | — | 10 | 91835A520 | 00000 | ||
| 6-32 | 3/16" | 0.05" | Brinell 205, Rockwell B95 | 0.13" | 0.28" | — | 10 | 91835A530 | 00000 | ||
| 8-32 | 7/32" | 0.05" | Brinell 190, Rockwell B90 | 0.16" | 0.31" | — | 10 | 91835A540 | 00000 | ||
| 10-32 | 1/4" | 0.05" | Brinell 190, Rockwell B90 | 0.18" | 0.34" | — | 10 | 91835A550 | 00000 | ||
| M4 x 0.7 mm | 7.5 mm | 1.5 mm | Brinell 125, Rockwell B70 | 4 mm | 8.5 mm | PLC-M4 | 5 | 91835A126 | 0000 | ||
| M5 x 0.8 mm | 8 mm | 1.5 mm | Brinell 125, Rockwell B70 | 4 mm | 9 mm | PLC-M5 | 5 | 91835A216 | 0000 | ||
Self-Aligning Press-Fit Locknuts for Sheet Metal
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Fasten together unaligned parts and keep screws in place. The threaded hole within these press-fit nuts shifts up to .01" in any direction, so you can fasten together thin panels with off-center holes. The irregularly shaped threads tightly grip screws to prevent them from loosening or backing out under vibration.
18-8 Stainless Steel—The choice for wet and outdoor environments, these nuts resist rust and mild chemicals.
Head | Barrel | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Drill Bit Size | For Min. Panel Thk. | For Maximum Panel Hardness | OD | Ht. | Dia. | Ht. | PEM® Part No. | Pkg. Qty. | Pkg. | |||
Distorted-Thread Locking | |||||||||||||
18-8 Stainless Steel | |||||||||||||
| 4-40 | L | 0.038" | Brinell 125, Rockwell B70 | 0.36" | 0.038" | 9/64" | 3/16" | LAC-440-1MD | 5 | 93177A110 | 000000 | ||
| 4-40 | L | 0.054" | Brinell 125, Rockwell B70 | 0.36" | 0.054" | 9/64" | 3/16" | LAC-440-2MD | 5 | 93177A120 | 00000 | ||
| 6-32 | 21/64" | 0.038" | Brinell 125, Rockwell B70 | 0.39" | 0.038" | 3/16" | 13/64" | LAC-632-1MD | 5 | 93177A130 | 00000 | ||
| 6-32 | 21/64" | 0.054" | Brinell 125, Rockwell B70 | 0.39" | 0.054" | 3/16" | 13/64" | LAC-632-2MD | 5 | 93177A140 | 00000 | ||
| 8-32 | U | 0.038" | Brinell 125, Rockwell B70 | 0.44" | 0.038" | 15/64" | 13/64" | LAC-832-1MD | 5 | 93177A150 | 00000 | ||
| 8-32 | U | 0.054" | Brinell 125, Rockwell B70 | 0.44" | 0.054" | 15/64" | 13/64" | LAC-832-2MD | 5 | 93177A160 | 00000 | ||
| 10-24 | 13/32" | 0.054" | Brinell 125, Rockwell B70 | 0.47" | 0.054" | 7/32" | 17/64" | LAC-024-2MD | 5 | 93177A170 | 00000 | ||
| 10-32 | 13/32" | 0.038" | Brinell 125, Rockwell B70 | 0.47" | 0.038" | 7/32" | 17/64" | LAC-032-1MD | 5 | 93177A180 | 00000 | ||
| 10-32 | 13/32" | 0.054" | Brinell 125, Rockwell B70 | 0.47" | 0.054" | 17/64" | 17/64" | LAC-032-2MD | 5 | 93177A190 | 00000 | ||
| 1/4"-20 | 33/64" | 0.054" | Brinell 125, Rockwell B70 | 0.6" | 0.054" | 11/32" | 5/16" | LAC-0420-2MD | 1 | 93177A210 | 0000 | ||
| M3 x 0.5 mm | 7.4 mm | 0.97 mm | Brinell 125, Rockwell B70 | 9.14 mm | 0.97 mm | 4.2 mm | 4.8 mm | LAC-M3-1MD | 5 | 93177A220 | 00000 | ||
| M3 x 0.5 mm | 7.4 mm | 1.38 mm | Brinell 125, Rockwell B70 | 9.14 mm | 1.38 mm | 3.6 mm | 4.8 mm | LAC-M3-2MD | 5 | 93177A230 | 00000 | ||
| M4 x 0.7 mm | 9.4 mm | 0.97 mm | Brinell 125, Rockwell B70 | 11.18 mm | 0.97 mm | 4.8 mm | 5.3 mm | LAC-M4-1MD | 5 | 93177A240 | 00000 | ||
| M4 x 0.7 mm | 9.4 mm | 1.38 mm | Brinell 125, Rockwell B70 | 11.18 mm | 1.38 mm | 4.8 mm | 5.3 mm | LAC-M4-2MD | 5 | 93177A250 | 00000 | ||
| M5 x 0.8 mm | 10.3 mm | 0.97 mm | Brinell 125, Rockwell B70 | 11.94 mm | 0.97 mm | 6 mm | 6.9 mm | LAC-M5-1MD | 5 | 93177A260 | 00000 | ||
| M5 x 0.8 mm | 10.3 mm | 1.38 mm | Brinell 125, Rockwell B70 | 11.94 mm | 1.38 mm | 6 mm | 6.9 mm | LAC-M5-2MD | 5 | 93177A270 | 00000 | ||
| M6 x 1 mm | 13.1 mm | 1.38 mm | Brinell 125, Rockwell B70 | 15.24 mm | 1.38 mm | 7.2 mm | 7.9 mm | LAC-M6-2MD | 1 | 93177A280 | 0000 | ||
Thick-Wall Highly Twist-Resistant Rivet Locknuts
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Keep screws locked in place with nuts that won't budge. Irregularly shaped threads stop screws from loosening under vibration and the hex-shaped body holds the nut in place when turning screws. With thick walls that distribute heavy loads better than standard walls, these nuts are strong enough for heavy machinery such as forklifts. The screw-locking threads require high torque, so you may need an impact wrench to remove screws.
Install these nuts in a drilled or punched round hole using a rivet nut tool. Choose an air- or battery-powered tool for faster installation or to install many different nut sizes. Length is measured from under the flange.
Zinc-Plated Steel—A step up from plain steel, the plating withstands occasional exposure to moisture.
Flange | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Wd. Across Flats | For Material Thk. | Body Dia. | Lg. | Installed Lg. | Dia. | Thk. | Pkg. Qty. | Pkg. | |||
Zinc-Plated Steel | ||||||||||||
| 1/4"-20 | 23/64" | 0.039" to 0.138" | 0.354" | 0.657" | 0.469" | 0.511" | 0.059" | 25 | 92009A110 | 000000 | ||
| 1/4"-20 | 23/64" | 0.138" to 0.236" | 0.354" | 0.756" | 0.469" | 0.511" | 0.059" | 25 | 92009A120 | 00000 | ||
| 1/4"-20 | 23/64" | 0.236" to 0.335" | 0.354" | 0.854" | 0.469" | 0.511" | 0.059" | 25 | 92009A130 | 00000 | ||
| 5/16"-18 | 7/16" | 0.031" to 0.157" | 0.432" | 0.771" | 0.535" | 0.63" | 0.059" | 10 | 92009A140 | 0000 | ||
| 5/16"-18 | 7/16" | 0.157" to 0.276" | 0.432" | 0.897" | 0.535" | 0.63" | 0.059" | 10 | 92009A150 | 0000 | ||
| 3/8"-16 | 33/64" | 0.039" to 0.177" | 0.511" | 0.91" | 0.689" | 0.748" | 0.079" | 10 | 92009A160 | 0000 | ||
| 3/8"-16 | 33/64" | 0.177" to 0.295" | 0.511" | 1.01" | 0.689" | 0.748" | 0.079" | 10 | 92009A170 | 0000 | ||
| M6 x 1 mm | 9 mm | 1 mm to 3.5 mm | 8.98 mm | 16.7 mm | 11.9 mm | 13 mm | 1.5 mm | 25 | 92009A180 | 00000 | ||
| M6 x 1 mm | 9 mm | 3.5 mm to 6 mm | 8.98 mm | 19.2 mm | 11.9 mm | 13 mm | 1.5 mm | 25 | 92009A190 | 00000 | ||
| M8 x 1.25 mm | 11 mm | 0.8 mm to 4 mm | 10.98 mm | 19.6 mm | 13.6 mm | 16 mm | 1.5 mm | 10 | 92009A210 | 0000 | ||
| M8 x 1.25 mm | 11 mm | 4 mm to 7 mm | 10.98 mm | 22.8 mm | 13.6 mm | 16 mm | 1.5 mm | 10 | 92009A220 | 0000 | ||
| M10 x 1.5 mm | 13 mm | 1 mm to 4.5 mm | 12.98 mm | 23.1 mm | 17.5 mm | 19 mm | 2 mm | 10 | 92009A230 | 0000 | ||
| M10 x 1.5 mm | 13 mm | 4.5 mm to 7.5 mm | 12.98 mm | 25.6 mm | 17.5 mm | 19 mm | 2 mm | 10 | 92009A240 | 0000 | ||
Weld Locknuts
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Prevent screws from backing out under heavy vibration. These nuts have distorted threads that grip screws tightly. Three evenly spaced projections concentrate heat away from the threads to prevent them from deforming and create consistent welds. These nuts also have a collar pilot that guides the nut into the hole, holds it in place while welding, and protects the threads from weld spatter.
Use Grade 2 or Class 6 screws to avoid stripping threads during installation. Distorted threads require high torque for fastening and unfastening, so you may need an impact wrench to remove screws.
Steel—Best for dry environments since moisture will cause them to rust. Made of uncoated steel, these nuts require minimal prep. Weld them to uncoated steel surfaces.
Collar | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Wd. | Ht. | Dia. | Ht. | For Hole Dia. | Pkg. Qty. | Pkg. | |||
Steel | ||||||||||
| 10-24 | 1/2" | 3/16" | 13/32" | 0.04" | 27/64" | 10 | 90744A150 | 00000 | ||
| 10-32 | 1/2" | 3/16" | 13/32" | 0.04" | 27/64" | 10 | 90744A140 | 0000 | ||
| 1/4"-20 | 15/32" | 11/64" | 13/32" | 0.04" | 27/64" | 100 | 90744A240 | 00000 | ||
| 1/4"-20 | 1/2" | 3/16" | 13/32" | 0.085" | 27/64" | 25 | 90744A210 | 0000 | ||
| 5/16"-18 | 35/64" | 13/64" | 15/32" | 0.04" | 31/64" | 100 | 90744A250 | 00000 | ||
| 5/16"-18 | 9/16" | 7/32" | 15/32" | 0.085" | 31/64" | 10 | 90744A350 | 0000 | ||
| 3/8"-16 | 39/64" | 15/64" | 17/32" | 0.05" | 35/64" | 50 | 90744A260 | 00000 | ||
| 3/8"-16 | 5/8" | 1/4" | 17/32" | 0.085" | 35/64" | 10 | 90744A170 | 0000 | ||
| 1/2"-13 | 25/32" | 23/64" | 23/32" | 0.06" | 47/64" | 50 | 90744A270 | 00000 | ||
| 1/2"-13 | 25/32" | 23/64" | 23/32" | 0.085" | 47/64" | 50 | 90744A280 | 00000 | ||
| 5/8"-11 | 59/64" | 27/64" | 25/32" | 0.085" | 51/64" | 25 | 90744A290 | 00000 | ||
| 5/8"-11 | 15/16" | 7/16" | 25/32" | 0.085" | 51/64" | 5 | 90744A230 | 0000 | ||
| M5 × 0.8 mm | 11 mm | 5.5 mm | 7.6 mm | 0.9 mm | 7.6 mm | 10 | 90744A360 | 0000 | ||
| M6 × 1 mm | 12.7 mm | 5.1 mm | 8.8 mm | 1 mm | 8.8 mm | 100 | 90744A310 | 00000 | ||
| M6 × 1 mm | 13 mm | 5.5 mm | 9.1 mm | 1.6 mm | 9.1 mm | 25 | 90744A220 | 0000 | ||
| M8 × 1.25 mm | 14.7 mm | 6.6 mm | 10.9 mm | 1 mm | 10.9 mm | 50 | 90744A320 | 00000 | ||
| M8 × 1.25 mm | 15 mm | 7 mm | 11.1 mm | 1.8 mm | 11.1 mm | 10 | 90744A180 | 0000 | ||
| M10 × 1.5 mm | 17.7 mm | 7.7 mm | 13.4 mm | 1.16 mm | 13.4 mm | 50 | 90744A330 | 00000 | ||
| M10 × 1.5 mm | 18 mm | 8 mm | 13.6 mm | 1.8 mm | 13.6 mm | 10 | 90744A190 | 0000 | ||
| M12 × 1.75 mm | 20.6 mm | 9.4 mm | 15.9 mm | 1.26 mm | 15.9 mm | 50 | 90744A340 | 00000 | ||
| M12 × 1.75 mm | 21 mm | 9.7 mm | 16.1 mm | 1.8 mm | 16.1 mm | 10 | 90744A160 | 0000 | ||
| M16 × 2 mm | 26 mm | 13 mm | 20.6 mm | 1.3 mm | 20.6 mm | 5 | 90744A130 | 0000 | ||
