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MS21042-5
Military Standard Locking Extended Washer Nut Self
Description
Nut
Specifications
| Features | Reduced Height |
|---|---|
| Hardness Rating | 49.0 rockwell c |
| Industry Standards/Certification | MS21042 |
| Locking Feature | Prevailing torque all metal design |
| Lubricant | Without Dry Film Lubricant |
| Lubrication | Soluble lubricant |
| Material | CRES |
| Maximum Diameter A | 0.520 in |
| Maximum Dimension H | 0.266 in |
| Maximum W (Across Flats) | 0.378 in |
| Minimum Dimension C | 0.419 in |
| Minimum Dimension H | 0.251 in |
| Minimum W (Across Flats) | 0.367 in |
| NIIN | 00-807-1469 |
| NSN | 5310-00-807-1469 |
| Nut Style | Hexagon |
| Overall Height | Between 0.251 inches and 0.266 inches |
| Service Temperature | 450 ºF |
| Shape | Reduced Hexagon |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Cl 3 federal specification single treatment response type 2 qq-p-416 |
| Temperature Rating | 450.0 degrees fahrenheit |
| Thread | 0.3125-24, 5/16-24 |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series | Unjf (fine thread with external controlled root radius) |
| Thread Size | 0.312, 5/16-24 |
| Type | Dry Hex Nut, Self-Locking Nut |
| Washer Outside Diameter | 0.520 |
| Washer Thickness | 0.023 |
| Weight | 0.0055 lb |
| Width Across Flats | Between 0.367 inches and 0.378 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 MS21042-5. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error