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Mil. Spec. Nylon-Insert Locknuts
These locknuts are manufactured and tested to strict U.S. military standards for material and construction. The nylon insert grips the screw to prevent loosening from moderate vibration without damaging threads. However, the insert may become brittle if exposed to high temperatures. These locknuts are reusable a handful of times, but the holding power decreases with each use.
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Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
Low-Strength Steel
 |
Thread Size | Wd. | Ht. | Mil. Spec. | Insert Max. Temp., ° F | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|---|
Cadmium Yellow-Chromate-Plated Steel | |||||||||
| 4-40 | 1/4" | 5/32" | MS21044-N04 | 250 | 10 | 95154A110 | 000000 | ||
| 6-32 | 5/16" | 3/16" | MS21044-N06 | 250 | 10 | 95154A120 | 00000 | ||
| 8-32 | 11/32" | 9/32" | MS21044-N08 | 250 | 10 | 95154A130 | 0000 | ||
| 10-32 | 3/8" | 9/32" | MS21044-N3 | 250 | 10 | 95154A140 | 0000 | ||
| 1/4"-28 | 7/16" | 23/64" | MS21044-N4 | 250 | 10 | 95154A150 | 0000 | ||
| 5/16"-24 | 1/2" | 23/64" | MS21044-N5 | 250 | 5 | 95154A160 | 0000 | ||
| 3/8"-24 | 9/16" | 15/32" | MS21044-N6 | 250 | 5 | 95154A170 | 00000 | ||
| 1/2"-20 | 3/4" | 19/32" | MS21044-N8 | 250 | 5 | 95154A180 | 0000 | ||
| 5/8"-18 | 15/16" | 3/4" | MS21044-N10 | 250 | 1 | 95154A190 | 0000 | ||
Corrosion-Resistant Stainless Steel
|
18-8 Stainless Steel—The choice for wet and outdoor environments, these locknuts resist rust. However, they won't hold up to the harsh chemicals that 316 stainless steel can.
Thread Size | Wd. | Ht. | Mil. Spec. | Insert Max. Temp., ° F | Pkg. Qty. | Pkg. | |||
|---|---|---|---|---|---|---|---|---|---|
18-8 Stainless Steel | |||||||||
| 2-56 | 1/4" | 9/64" | MS17830-02C, MS21044C02, NASM17830, NASM21044 | 250 | 1 | 96345A186 | 00000 | ||
| 4-40 | 1/4" | 5/32" | MS21044C04, NASM21044 | 250 | 10 | 96345A210 | 00000 | ||
| 6-32 | 5/16" | 3/16" | MS21044C06, NASM21044 | 250 | 10 | 96345A220 | 0000 | ||
| 8-32 | 11/32" | 9/32" | MS21044C08, NASM21044 | 250 | 10 | 96345A230 | 00000 | ||
| 10-32 | 3/8" | 9/32" | MS21044C3, NASM21044 | 250 | 10 | 96345A240 | 00000 | ||
| 1/4"-28 | 7/16" | 23/64" | MS21044C4, NASM21044 | 250 | 5 | 96345A250 | 00000 | ||
| 3/8"-24 | 9/16" | 15/32" | MS17830-6F, MS21044C6, NASM17830, NASM21044 | 250 | 1 | 96345A342 | 0000 | ||
| 7/16"-20 | 11/16" | 15/32" | MS17830-7F, MS21044C7, NASM17830, NASM21044 | 250 | 1 | 96345A765 | 00000 | ||
