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About Nuts, Materials, and Finishes
More
Mil. Spec. Medium-Strength Steel Hex Nuts
Choose these nuts for their good corrosion resistance and adherence to strict military standards for material and construction. They're suitable for fastening most machinery and equipment.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Specifications Met | Pkg. Qty. | Pkg. | |
Cadmium Yellow-Chromate Plated Steel—Grade 5 | ||||||
|---|---|---|---|---|---|---|
| 1/4"-20 | 7/16" | 7/32" | MS51967-2, Fed. Spec. FF-N-836 | 25 | 000000000 | 00000 |
| 1/4"-28 | 7/16" | 7/32" | MS51968-2, Fed. Spec. FF-N-836 | 25 | 000000000 | 0000 |
| 5/16"-18 | 1/2" | 17/64" | MS51967-5, Fed. Spec. FF-N-836 | 25 | 000000000 | 0000 |
| 5/16"-24 | 1/2" | 17/64" | MS51968-5, Fed. Spec. FF-N-836 | 25 | 000000000 | 0000 |
| 3/8"-16 | 9/16" | 21/64" | MS51967-8, Fed. Spec. FF-N-836 | 10 | 000000000 | 0000 |
| 3/8"-24 | 9/16" | 21/64" | MS51968-8, Fed. Spec. FF-N-836 | 10 | 000000000 | 0000 |
| 7/16"-20 | 11/16" | 3/8" | MS51968-11, Fed. Spec. FF-N-836 | 10 | 000000000 | 00000 |
| 1/2"-13 | 3/4" | 7/16" | MS51967-14, Fed. Spec. FF-N-836 | 10 | 000000000 | 0000 |
| 1/2"-20 | 3/4" | 7/16" | MS51968-14, Fed. Spec. FF-N-836 | 10 | 000000000 | 0000 |
| 5/8"-11 | 15/16" | 35/64" | MS51967-20, Fed. Spec. FF-N-836 | 5 | 000000000 | 0000 |
| 5/8"-18 | 15/16" | 35/64" | MS51968-20, Fed. Spec. FF-N-836 | 5 | 000000000 | 0000 |
| 3/4"-10 | 1 1/8" | 41/64" | MS51967-23, Fed. Spec. FF-N-836 | 1 | 000000000 | 0000 |
| 3/4"-16 | 1 1/8" | 41/64" | MS51968-23, Fed. Spec. FF-N-836 | 5 | 000000000 | 00000 |
Mil. Spec. High-Strength Steel Hex Nuts
Choose these nuts for their good corrosion resistance and adherence to strict military standards for material and construction. They're about 25% stronger than medium-strength steel nuts.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Specifications Met | Pkg. Qty. | Pkg. | |
Cadmium Yellow-Chromate Plated Steel—Grade 8 | ||||||
|---|---|---|---|---|---|---|
| 1/4"-20 | 7/16" | 7/32" | Fed. Spec. FF-N-836, MS51967-3 | 25 | 000000000 | 00000 |
| 1/4"-28 | 7/16" | 7/32" | Fed. Spec. FF-N-836, MS51968-3 | 25 | 000000000 | 0000 |
| 5/16"-18 | 1/2" | 17/64" | Fed. Spec. FF-N-836, MS51967-6 | 25 | 000000000 | 0000 |
| 5/16"-24 | 1/2" | 17/64" | Fed. Spec. FF-N-836, MS51968-6 | 25 | 000000000 | 0000 |
| 3/8"-16 | 9/16" | 21/64" | Fed. Spec. FF-N-836, MS51967-9 | 10 | 000000000 | 0000 |
| 3/8"-24 | 9/16" | 21/64" | Fed. Spec. FF-N-836, MS51968-9 | 10 | 000000000 | 0000 |
| 7/16"-14 | 11/16" | 3/8" | Fed. Spec. FF-N-836, MS51967-12 | 5 | 000000000 | 0000 |
| 7/16"-20 | 11/16" | 3/8" | Fed. Spec. FF-N-836, MS51968-12 | 5 | 000000000 | 0000 |
| 1/2"-13 | 3/4" | 7/16" | Fed. Spec. FF-N-836, MS51967-15 | 5 | 000000000 | 0000 |
| 1/2"-20 | 3/4" | 7/16" | Fed. Spec. FF-N-836, MS51968-15 | 5 | 000000000 | 0000 |
| 9/16"-18 | 7/8" | 31/64" | Fed. Spec. FF-N-836, MS51968-18 | 5 | 000000000 | 0000 |
| 5/8"-11 | 15/16" | 35/64" | Fed. Spec. FF-N-836, MS51967-21 | 5 | 000000000 | 0000 |
| 5/8"-18 | 15/16" | 35/64" | Fed. Spec. FF-N-836, MS51968-21 | 5 | 000000000 | 0000 |
| 3/4"-10 | 1 1/8" | 41/64" | Fed. Spec. FF-N-836, MS51967-24 | 1 | 000000000 | 0000 |
| 3/4"-16 | 1 1/8" | 41/64" | Fed. Spec. FF-N-836, MS51968-24 | 1 | 000000000 | 0000 |
Mil. Spec. Low-Strength Steel Hex Nuts
Choose these nuts for their good corrosion resistance and adherence to strict military standards for material and construction. About half the strength of medium-strength steel nuts, these nuts are for light duty fastening applications, such as securing access panels.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Specifications Met | Pkg. Qty. | Pkg. | |
Cadmium Yellow-Chromate Plated Steel | ||||||
|---|---|---|---|---|---|---|
| 2-56 | 3/16" | 1/16" | MS35649-222, Fed. Spec. FF-N-836 | 10 | 000000000 | 00000 |
| 4-40 | 1/4" | 3/32" | MS35649-242, Fed. Spec. FF-N-836 | 50 | 000000000 | 0000 |
| 6-32 | 5/16" | 7/64" | MS35649-262, Fed. Spec. FF-N-836 | 10 | 000000000 | 0000 |
| 8-32 | 11/32" | 1/8" | MS35649-282, Fed. Spec. FF-N-836 | 50 | 000000000 | 0000 |
| 10-24 | 3/8" | 1/8" | MS35649-202, Fed. Spec. FF-N-836 | 50 | 000000000 | 00000 |
| 10-32 | 3/8" | 1/8" | MS35650-302, Fed. Spec. FF-N-836 | 50 | 000000000 | 00000 |
| 1/4"-20 | 7/16" | 3/16" | MS35649-2252, Fed. Spec. FF-N-836 | 50 | 000000000 | 00000 |
| 5/16"-18 | 9/16" | 7/32" | MS35649-2312, Fed. Spec. FF-N-836 | 25 | 000000000 | 00000 |
| 3/8"-16 | 5/8" | 1/4" | MS35649-2382, Fed. Spec. FF-N-836 | 25 | 000000000 | 00000 |
Extreme-Strength Steel Hex Nuts—Grade 9
These nuts are about 20% stronger than high-strength steel nuts and are often used in heavy machinery, such as earth-moving equipment. They're cadmium yellow-chromate plated to resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Pkg. Qty. | Pkg. | |
Cadmium Yellow-Chromate Plated Steel—Grade 9 | |||||
|---|---|---|---|---|---|
| 1/4"-20 | 7/16" | 17/64" | 50 | 000000000 | 000000 |
| 1/4"-28 | 7/16" | 17/64" | 50 | 000000000 | 00000 |
| 5/16"-18 | 1/2" | 5/16" | 25 | 000000000 | 0000 |
| 5/16"-24 | 1/2" | 5/16" | 25 | 000000000 | 00000 |
| 3/8"-16 | 9/16" | 25/64" | 25 | 000000000 | 00000 |
| 3/8"-24 | 9/16" | 25/64" | 25 | 000000000 | 00000 |
| 7/16"-14 | 11/16" | 7/16" | 10 | 000000000 | 0000 |
| 7/16"-20 | 11/16" | 7/16" | 10 | 000000000 | 0000 |
| 1/2"-13 | 3/4" | 17/32" | 10 | 000000000 | 0000 |
| 1/2"-20 | 3/4" | 17/32" | 10 | 000000000 | 00000 |
| 5/8"-11 | 15/16" | 11/16" | 5 | 000000000 | 0000 |
| 5/8"-18 | 15/16" | 11/16" | 5 | 000000000 | 00000 |
| 3/4"-10 | 1 1/8" | 25/32" | 1 | 000000000 | 0000 |
| 3/4"-16 | 1 1/8" | 25/32" | 1 | 000000000 | 0000 |
| 7/8"-9 | 1 5/16" | 55/64" | 1 | 000000000 | 0000 |
| 7/8"-14 | 1 5/16" | 55/64" | 1 | 000000000 | 0000 |
| 1"-8 | 1 1/2" | 1" | 1 | 000000000 | 00000 |
| 1"-14 | 1 1/2" | 1" | 1 | 000000000 | 00000 |
Mil. Spec. Steel Flex-Top Locknuts for Heavy Vibration
Choose these locknuts for their adherence to strict military standards for material and construction. Threads at the top of the nut expand to grip the bolt on all sides for a stronger hold than distorted-thread locknuts. The strength of the bolt should match the strength of the nut to prevent damaging threads. These locknuts have equivalent strength to Grade 8 steel locknuts. A cadmium yellow-chromate plating provides corrosion resistance in wet environments and adds lubricity so they thread on smoothly.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Specifications Met | Pkg. Qty. | Pkg. | |
Cadmium Yellow-Chromate Plated Steel | ||||||
|---|---|---|---|---|---|---|
| 4-40 | 1/4" | 5/32" | MS21045-04 | 5 | 000000000 | 00000 |
| 6-32 | 5/16" | 3/16" | MS21045-06 | 5 | 000000000 | 0000 |
| 8-32 | 11/32" | 1/4" | MS21045-08 | 5 | 000000000 | 0000 |
| 10-32 | 3/8" | 1/4" | MS21045-3 | 5 | 000000000 | 0000 |
| 1/4"-28 | 7/16" | 5/16" | MS21045-4 | 5 | 000000000 | 0000 |
| 5/16"-24 | 1/2" | 23/64" | MS21045-5 | 5 | 000000000 | 00000 |
| 3/8"-24 | 9/16" | 15/32" | MS21045-6 | 5 | 000000000 | 00000 |
| 7/16"-20 | 11/16" | 15/32" | MS21045-7 | 1 | 000000000 | 0000 |
| 1/2"-20 | 3/4" | 39/64" | MS21045-8 | 1 | 000000000 | 0000 |
| 9/16"-18 | 7/8" | 11/16" | MS21045-9 | 1 | 000000000 | 0000 |
| 5/8"-18 | 15/16" | 49/64" | MS21045-10 | 1 | 000000000 | 00000 |
| 3/4"-16 | 1 1/16" | 57/64" | MS21045-12 | 1 | 000000000 | 00000 |
Nylon-Insert Press-Fit Locknuts for Sheet Metal
These press-fit nuts have a nylon insert that grips threads to resist loosening and knurls on the bottom of the nut that hold them firmly in place. Press them into a drilled or punched hole with an installation tool or an arbor press. Installation requires access to both sides of the panel.
Cadmium yellow-chromate plated steel locknuts resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Drill Bit Size | For Min. Panel Thick. | Flange Dia. | Head Ht. | Insert Max. Temp., °F | Pkg. Qty. | Pkg. | |
Cadmium Yellow-Chromate Plated Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| 2-56 | 1/8" | 0.06" | 0.17" | 0.08" | 250° | 10 | 000000000 | 00000 |
| 4-40 | 5/32" | 0.06" | 0.2" | 0.09" | 250° | 10 | 000000000 | 0000 |
| 6-32 | 3/16" | 0.06" | 0.28" | 0.13" | 250° | 10 | 000000000 | 0000 |
| 10-32 | 1/4" | 0.06" | 0.34" | 0.18" | 250° | 10 | 000000000 | 0000 |