Specifications Met Specifications Met |
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System of Measurement System of Measurement |
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Material Material |
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Locking Type Locking Type |
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 | Nylon Insert |
Hex Nut Profile Hex Nut Profile |
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 | Standard |
Insert Maximum Temperature Insert Maximum Temperature |
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Thread Fit Thread Fit |
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Finish Finish |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Thread Direction Thread Direction |
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Drive Style Drive Style |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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About Nuts, Materials, and Finishes
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Mil. Spec. Low-Strength Steel Nylon-Insert Locknuts
Choose these locknuts for their adherence to strict military standards for material and construction. The nylon insert grips the bolt to resist loosening without damaging threads. These locknuts are reusable, but their holding power lessens with each use. 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. | Insert Max. Temp., °F | Specifications Met | Pkg. Qty. | Pkg. | |
Cadmium Yellow-Chromate Plated Steel | |||||||
|---|---|---|---|---|---|---|---|
| 4-40 | 1/4" | 5/32" | 250° | MS21044-N04 | 10 | 000000000 | 00000 |
| 6-32 | 5/16" | 3/16" | 250° | MS21044-N06 | 10 | 000000000 | 0000 |
| 8-32 | 11/32" | 9/32" | 250° | MS21044-N08 | 10 | 000000000 | 0000 |
| 10-32 | 3/8" | 9/32" | 250° | MS21044-N3 | 10 | 000000000 | 0000 |
| 1/4"-28 | 7/16" | 23/64" | 250° | MS21044-N4 | 10 | 000000000 | 0000 |
| 5/16"-24 | 1/2" | 23/64" | 250° | MS21044-N5 | 5 | 000000000 | 00000 |
| 3/8"-24 | 9/16" | 15/32" | 250° | MS21044-N6 | 5 | 000000000 | 00000 |
| 1/2"-20 | 3/4" | 19/32" | 250° | MS21044-N8 | 5 | 000000000 | 0000 |
| 5/8"-18 | 15/16" | 3/4" | 250° | MS21044-N10 | 1 | 000000000 | 0000 |
Mil. Spec. 18-8 Stainless Steel Nylon-Insert Locknuts
Choose these locknuts for their adherence to strict military standards for material and construction. Made from 18-8 stainless steel, they have good chemical resistance and may be mildly magnetic. The nylon insert grips the bolt to resist loosening without damaging threads. They're reusable, but their holding power lessens with each use.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Wd. | Ht. | Insert Max. Temp., °F | Specifications Met | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||
|---|---|---|---|---|---|---|---|
| 2-56 | 1/4" | 9/64" | 250° | MS17830-02C, MS21044C02, NASM17830, NASM21044 | 1 | 000000000 | 00000 |
| 4-40 | 1/4" | 5/32" | 250° | MS21044C04, NASM21044 | 10 | 000000000 | 00000 |
| 6-32 | 5/16" | 3/16" | 250° | MS21044C06, NASM21044 | 10 | 000000000 | 0000 |
| 8-32 | 11/32" | 9/32" | 250° | MS21044C08, NASM21044 | 10 | 000000000 | 00000 |
| 10-32 | 3/8" | 9/32" | 250° | MS21044C3, NASM21044 | 10 | 000000000 | 00000 |
| 1/4"-28 | 7/16" | 23/64" | 250° | MS21044C4, NASM21044 | 5 | 000000000 | 00000 |
| 3/8"-24 | 9/16" | 15/32" | 250° | MS17830-6F, MS21044C6, NASM17830, NASM21044 | 1 | 000000000 | 0000 |
| 7/16"-20 | 11/16" | 15/32" | 250° | MS17830-7F, MS21044C7, NASM17830, NASM21044 | 1 | 000000000 | 00000 |