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NAS1291-9
Locking Extended Washer Nut Self
Description
Self Locking Hex Nut
Specifications
| Countersink Angle | 120 degrees |
|---|---|
| Dimension A | 0.420 in |
| Dimension B | 0.680 in |
| Dimension H | 0.320 in |
| Dimension W | 0.912 in |
| Features | Lightweight |
| Industry Standards/Certification | NAS1291 |
| Locking Feature | Prevailing torque all metal design |
| Lubrication | Dry film lubricant |
| Material | Steel |
| NIIN | 00-224-0471 |
| NSN | 5310-00-224-0471 |
| Nut Style | Hexagon |
| Overall Height | Between 0.42 inches and 0.48 inches |
| Service Temperature | 450 ºF |
| Specification Data | 80205-nas1291 government standard |
| Surface Treatment | Cadmium |
| Surface Treatment Specification | Class 3 federal specification single treatment response type 1 qq-p-416 |
| Temperature Rating | 450 degrees fahrenheit |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty Per Inch (tpi) | 18 |
| Thread Series | Unjf (fine thread with external controlled root radius) |
| Thread Size | 0.5625-18 |
| Type | Self-Locking Nut |
| Washer Outside Diameter | 0.912 |
| Washer Thickness | 0.045 |
| Weight | 0.03 lb |
| Width Across Flats | Between 0.68 inches and 0.692 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 NAS1291-9. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error