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About Nuts, Materials, and Finishes
More
Stainless Steel Socket Nuts
These nuts are chemical resistant and may be mildly magnetic. Also known as Allen nuts, use them 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.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Thread Pitch | OD | Ht. | Threading | Thread Dp. | For Hole Dia. | Hex Key Size | Each | |
18-8 Stainless Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 4-40 | __ | 0.18" | 0.17" | Partially Threaded | 0.08" | 0.202" | 1/8" | 000000000 | 00000 |
| 5-40 | __ | 0.19" | 0.21" | Partially Threaded | 0.1" | 0.202" | 1/8" | 000000000 | 0000 |
| 6-32 | __ | 0.25" | 0.22" | Partially Threaded | 0.1" | 0.27" | 5/32" | 000000000 | 0000 |
| 8-32 | __ | 0.28" | 0.27" | Partially Threaded | 0.13" | 0.298" | 3/16" | 000000000 | 0000 |
| 10-24 | __ | 0.3" | 0.31" | Partially Threaded | 0.17" | 0.327" | 3/16" | 000000000 | 0000 |
| 10-32 | __ | 0.31" | 0.32" | Partially Threaded | 0.17" | 0.327" | 3/16" | 000000000 | 0000 |
| 1/4"-20 | __ | 0.4" | 0.41" | Partially Threaded | 0.23" | 0.421" | 1/4" | 000000000 | 0000 |
| 1/4"-28 | __ | 0.4" | 0.42" | Partially Threaded | 0.23" | 0.421" | 1/4" | 000000000 | 0000 |
| 5/16"-18 | __ | 0.49" | 0.51" | Partially Threaded | 0.29" | 0.52" | 5/16" | 000000000 | 0000 |
| 5/16"-24 | __ | 0.5" | 0.52" | Partially Threaded | 0.29" | 0.516" | 5/16" | 000000000 | 0000 |
| 3/8"-16 | __ | 0.59" | 0.61" | Partially Threaded | 0.33" | 0.61" | 3/8" | 000000000 | 0000 |
| 3/8"-24 | __ | 0.59" | 0.62" | Partially Threaded | 0.33" | 0.61" | 3/8" | 000000000 | 0000 |
| 7/16"-14 | __ | 0.71" | 0.73" | Partially Threaded | 0.36" | 0.733" | 7/16" | 000000000 | 0000 |
| 1/2"-13 | __ | 0.8" | 0.84" | Partially Threaded | 0.45" | 0.831" | 1/2" | 000000000 | 0000 |
| 1/2"-20 | __ | 0.8" | 0.84" | Partially Threaded | 0.45" | 0.831" | 1/2" | 000000000 | 0000 |
| 5/8"-11 | __ | 0.99" | 1.01" | Partially Threaded | 1/2" | 1.028" | 5/8" | 000000000 | 00000 |
| 3/4"-10 | __ | 1.16" | 1.19" | Partially Threaded | 0.6" | 1.203" | 3/4" | 000000000 | 00000 |
| 3/4"-16 | __ | 1.16" | 1.19" | Partially Threaded | 0.6" | 1.203" | 3/4" | 000000000 | 00000 |
| 1"-8 | __ | 1.53" | 1.53" | Partially Threaded | 0.81" | 1.605" | 1" | 000000000 | 00000 |
| M2 | 0.4mm | 4mm | 5mm | Partially Threaded | 2mm | 4.3mm | 3/32" | 000000000 | 0000 |
| M2.5 | 0.45mm | 5mm | 6mm | Partially Threaded | 2mm | 5.1mm | 3/32" | 000000000 | 0000 |
| M3 | 0.5mm | 5mm | 4.6mm | Partially Threaded | 2mm | 5.1mm | 1/8" | 000000000 | 0000 |
| M4 | 0.7mm | 7mm | 6.9mm | Partially Threaded | 3.3mm | 7.6mm | 3/16" | 000000000 | 0000 |
| M5 | 0.8mm | 8mm | 8.1mm | Partially Threaded | 4.3mm | 8.3mm | 3/16" | 000000000 | 0000 |
| M6 | 1mm | 10mm | 10.7mm | Partially Threaded | 5.8mm | 10.7mm | 1/4" | 000000000 | 0000 |
| M8 | 1.25mm | 13mm | 13.2mm | Partially Threaded | 7.4mm | 13.1mm | 5/16" | 000000000 | 0000 |
| M10 | 1.5mm | 15mm | 15.8mm | Partially Threaded | 8.4mm | 15.5mm | 3/8" | 000000000 | 0000 |
| M12 | 1.75mm | 18mm | 18.5mm | Partially Threaded | 9.1mm | 18.6mm | 7/16" | 000000000 | 0000 |
| M14 | 2mm | 20mm | 21.3mm | Partially Threaded | 11.4mm | 21.1mm | 1/2" | 000000000 | 00000 |
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 | Thread Pitch | OD | Ht. | Threading | Thread Dp. | For Hole Dia. | Hex Key Size | Each | |
Alloy Steel | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 4-40 | __ | 0.18" | 0.17" | Partially Threaded | 0.08" | 0.202" | 1/8" | 000000000 | 00000 |
| 5-40 | __ | 0.18" | 0.2" | Partially Threaded | 0.1" | 0.202" | 1/8" | 000000000 | 0000 |
| 6-32 | __ | 0.25" | 0.22" | Partially Threaded | 0.1" | 0.27" | 5/32" | 000000000 | 0000 |
| 8-32 | __ | 0.28" | 0.27" | Partially Threaded | 0.13" | 0.298" | 3/16" | 000000000 | 0000 |
| 10-24 | __ | 0.3" | 0.31" | Partially Threaded | 0.17" | 0.327" | 3/16" | 000000000 | 0000 |
| 10-32 | __ | 0.3" | 0.31" | Partially Threaded | 0.17" | 0.327" | 3/16" | 000000000 | 0000 |
| 1/4"-20 | __ | 0.4" | 0.41" | Partially Threaded | 0.23" | 0.421" | 1/4" | 000000000 | 0000 |
| 1/4"-28 | __ | 0.4" | 0.41" | Partially Threaded | 0.23" | 0.421" | 1/4" | 000000000 | 0000 |
| 5/16"-18 | __ | 0.5" | 1/2" | Partially Threaded | 0.29" | 0.516" | 5/16" | 000000000 | 0000 |
| 5/16"-24 | __ | 0.49" | 0.51" | Partially Threaded | 0.29" | 0.516" | 5/16" | 000000000 | 0000 |
| 3/8"-16 | __ | 0.59" | 0.61" | Partially Threaded | 0.33" | 0.61" | 3/8" | 000000000 | 0000 |
| 3/8"-24 | __ | 0.59" | 0.61" | Partially Threaded | 0.33" | 0.61" | 3/8" | 000000000 | 0000 |
| 7/16"-14 | __ | 0.71" | 0.72" | Partially Threaded | 0.36" | 0.733" | 7/16" | 000000000 | 0000 |
| 7/16"-20 | __ | 0.71" | 0.72" | Partially Threaded | 0.36" | 0.733" | 7/16" | 000000000 | 0000 |
| 1/2"-13 | __ | 0.8" | 0.82" | Partially Threaded | 0.45" | 0.831" | 1/2" | 000000000 | 0000 |
| 1/2"-20 | __ | 0.8" | 0.82" | Partially Threaded | 0.45" | 0.831" | 1/2" | 000000000 | 0000 |
| 5/8"-11 | __ | 0.98" | 1" | Partially Threaded | 0.5" | 1.028" | 5/8" | 000000000 | 0000 |
| 5/8"-18 | __ | 0.98" | 1" | Partially Threaded | 0.5" | 1.028" | 5/8" | 000000000 | 0000 |
| 3/4"-10 | __ | 1.15" | 1.17" | Partially Threaded | 0.6" | 1.203" | 3/4" | 000000000 | 0000 |
| 3/4"-16 | __ | 1.15" | 1.17" | Partially Threaded | 0.6" | 1.203" | 3/4" | 000000000 | 0000 |
| 7/8"-9 | __ | 1.36" | 1.34" | Partially Threaded | 0.7" | 1.418" | 7/8" | 000000000 | 00000 |
| 7/8"-14 | __ | 1.36" | 1.34" | Partially Threaded | 0.7" | 1.418" | 7/8" | 000000000 | 00000 |
| 1"-8 | __ | 1.53" | 1.52" | Partially Threaded | 0.81" | 1.606" | 1" | 000000000 | 00000 |
| 1"-14 | __ | 1.53" | 1.52" | Partially Threaded | 0.81" | 1.606" | 1" | 000000000 | 00000 |
| M2 | 0.4 mm | 4mm | 5mm | Partially Threaded | 2mm | 4.3mm | 3/32" | 000000000 | 0000 |
| M2.5 | 0.45 mm | 5mm | 6mm | Partially Threaded | 2mm | 5.3mm | 3/32" | 000000000 | 0000 |
| M3 | 0.5 mm | 5mm | 6mm | Partially Threaded | 2mm | 5.3mm | 1/8" | 000000000 | 0000 |
| M4 | 0.7 mm | 7mm | 8mm | Partially Threaded | 3.3mm | 7.6mm | 3/16" | 000000000 | 0000 |
| M5 | 0.8 mm | 8mm | 10mm | Partially Threaded | 4.3mm | 8.3mm | 3/16" | 000000000 | 0000 |
| M6 | 1 mm | 10mm | 10mm | Partially Threaded | 5.8mm | 10.7mm | 1/4" | 000000000 | 0000 |
| M8 | 1.25 mm | 13mm | 12mm | Partially Threaded | 7.4mm | 13.7mm | 5/16" | 000000000 | 0000 |
| M10 | 1.5 mm | 15mm | 16mm | Partially Threaded | 8.4mm | 15.7mm | 3/8" | 000000000 | 00000 |
| M12 | 1.75 mm | 18mm | 22mm | Partially Threaded | 9.1mm | 18.6mm | 7/16" | 000000000 | 00000 |
| M14 | 2 mm | 20mm | 24mm | Partially Threaded | 11.4mm | 21.1mm | 1/2" | 000000000 | 00000 |
| M16 | 2 mm | 25mm | 26mm | Partially Threaded | 12.7mm | 26mm | 9/16" | 000000000 | 00000 |
| M18 | 2.5 mm | 25mm | 30mm | Partially Threaded | 15mm | 26.1mm | 5/8" | 000000000 | 00000 |