nuts › self-locking extended washer nuts
NAS1291C8M
Locking Extended Washer Nut Self
Description
Self Locking Hex Nut
Specifications
| Countersink Angle | 120.0 degrees nut |
|---|---|
| Locking Feature | Prevailing torque all metal design |
| Lubrication | Dry film lubricant |
| Material | Iron |
| Material Specification | Ams 5732 assn standard single material response or ams 5737 assn standard single material response or ams 5525 assn standard single material response |
| Nut Style | Hexagon |
| Overall Height | Between 0.350 inches and 0.410 inches |
| Surface Treatment | Passivate |
| Temperature Rating | 450.0 degrees fahrenheit |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 20 |
| Thread Qty Per Inch (tpi) | 20 |
| Thread Series | Unjf (fine thread with external controlled root radius) |
| Thread Size | 0.500 |
| Washer Outside Diameter | 0.814 |
| Washer Thickness | 0.040 |
| Weight | 0.01 lb |
| Width Across Flats | Between 0.556 inches and 0.566 inches |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1291C8M. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error