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Nylon-Insert Press-Fit Locknuts for Sheet Metal
A nylon insert in these press-fit locknuts grips threads to prevent screws from loosening while knurls on the bottom hold these locknuts firmly in place. Use these locknuts to add permanent threads to sheet metal, similar to weld nuts but without the setup and mess. Also known as clinch-style captive nuts, press them into a drilled or punched hole with an arbor press or installation tool. The pressure forms your sheet metal into the knurls of the locknut, making the locknut inseparable from the sheet. Installation requires access to both sides of the panel.
Zinc-plated and cadmium yellow-chromate plated steel locknuts resist corrosion in wet environments.
18-8 stainless steel locknuts are more corrosion resistant than plated steel locknuts. They resist mild chemicals in addition to water.
For technical drawings and 3-D models, click on a part number.
Thread Size | Drill Bit Size | For Min. Panel Thick. | For Max. Panel Hardness | Flange Dia. | Head Ht. | Insert Max. Temp., °F | Pkg. Qty. | Pkg. | |
Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 4-40 | 5/32" | 0.05" | Brinell 205, Rockwell B95 | 0.2" | 0.09" | 250° | 10 | 000000000 | 00000 |
| 6-32 | 3/16" | 0.05" | Brinell 205, Rockwell B95 | 0.28" | 0.13" | 250° | 10 | 000000000 | 0000 |
| 8-32 | 7/32" | 0.05" | Brinell 205, Rockwell B95 | 0.31" | 0.16" | 250° | 10 | 000000000 | 00000 |
Cadmium Yellow-Chromate Plated Steel | |||||||||
| 6-32 | 3/16" | 0.05" | Brinell 205, Rockwell B95 | 0.28" | 0.13" | 250° | 10 | 000000000 | 00000 |
| 10-32 | 1/4" | 0.05" | Brinell 205, Rockwell B95 | 0.34" | 0.18" | 250° | 10 | 000000000 | 0000 |
18-8 Stainless Steel | |||||||||
| 2-56 | 1/8" | 0.05" | Brinell 240, Rockwell B100 | 0.17" | 0.08" | 250° | 10 | 000000000 | 00000 |
| 4-40 | 5/32" | 0.05" | Brinell 205, Rockwell B95 | 0.2" | 0.09" | 250° | 10 | 000000000 | 00000 |
| 6-32 | 3/16" | 0.05" | Brinell 205, Rockwell B95 | 0.28" | 0.13" | 250° | 10 | 000000000 | 00000 |
| 8-32 | 7/32" | 0.05" | Brinell 190, Rockwell B90 | 0.31" | 0.16" | 250° | 10 | 000000000 | 00000 |
| 10-32 | 1/4" | 0.05" | Brinell 190, Rockwell B90 | 0.34" | 0.18" | 250° | 10 | 000000000 | 00000 |
Thread | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Size | Pitch, mm | Drill Bit Size | For Min. Panel Thick., mm | For Max. Panel Hardness | Flange Dia., mm | Head Ht., mm | Insert Max. Temp., °F | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | ||||||||||
| M3 | 0.5 | 6 mm | 1.5 | Brinell 125, Rockwell B70 | 7 | 3 | 250° | 10 | 000000000 | 00000 |
| M4 | 0.7 | 7.5 mm | 1.5 | Brinell 125, Rockwell B70 | 8.5 | 4 | 250° | 10 | 000000000 | 0000 |
| M5 | 0.8 | 8 mm | 1.5 | Brinell 125, Rockwell B70 | 9 | 4 | 250° | 10 | 000000000 | 0000 |
18-8 Stainless Steel | ||||||||||
| M4 | 0.7 | 7.5 mm | 1.5 | Brinell 125, Rockwell B70 | 8.5 | 4 | 250° | 5 | 000000000 | 0000 |
| M5 | 0.8 | 8 mm | 1.5 | Brinell 125, Rockwell B70 | 9 | 4 | 250° | 5 | 000000000 | 0000 |