nuts › self-locking extended washer nuts
NAS1291-7
Locking Extended Washer Nut Self
Description
Self Locking Hex Nut
Specifications
| Alternate Part Number | MS21042-7 |
|---|---|
| Dimension A | 0.313 in |
| Dimension B | 0.494 in |
| Dimension H | 0.160 in |
| Dimension W | 0.708 in |
| Features | Lightweight |
| Industry Standards/Certification | NAS1291 |
| Locking Feature | Prevailing torque all metal design |
| Material | Steel |
| NIIN | 00-918-0482 |
| NSN | 5310-00-918-0482 |
| Nut Style | Hexagon |
| Overall Height | Between 0.313 inches and 0.328 inches |
| Service Temperature | 450 ºF |
| Surface Treatment | Cadmium and chromate |
| Temperature Rating | 450.0 degrees fahrenheit |
| Thread | 7/16-20 |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 20 |
| Thread Qty Per Inch (tpi) | 20 |
| Thread Series | Unf (fine thread) |
| Thread Size | 0.4375-20, 0.438 |
| Type | Self-Locking Nut |
| Washer Outside Diameter | 0.708 |
| Washer Thickness | 0.035 |
| Weight | 0.01 lb |
| Width Across Flats | Between 0.494 inches and 0.504 inches |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- NAS1291-7
- NAS1291-8
- NAS1291-9
- NAS1291-10
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1291-7. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error