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MS21043-4
Military Standard Locking Extended Washer Nut Self
Description
Nut
Specifications
| Features | Heat Resistant |
|---|---|
| Finish | Silver Plate |
| Industry Standards/Certification | MS21043 |
| Locking Feature | Prevailing torque all metal design |
| Material | CRES |
| Material Specification | Ams 5525 assn standard single material response or ams 5732 assn standard single material response or ams 5737 assn standard single material response |
| Maximum Diameter A | 0.420 in |
| Maximum Dimension H | 0.219 in |
| Maximum Dimension W | 0.316 in |
| Minimum Dimension C | 0.347 in |
| Minimum Dimension H | 0.204 in |
| Minimum Dimension W | 0.304 in |
| NIIN | 00-719-5570 |
| NSN | 5310-00-719-5570 |
| Nut Style | Hexagon |
| Overall Height | Between 0.205 inches and 0.219 inches |
| Precious Material And Location | External surface silver |
| Service Temperature | 800 ºF |
| Shape | Reduced Hexagon |
| Surface Treatment | Silver |
| Surface Treatment Specification | Ams 2410 assn standard single treatment response |
| Temperature Rating | 900 degrees fahrenheit |
| Thread | 1/4-28 |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | Unf (fine thread) |
| Thread Size | 0.25, 1/4-28 |
| Type | Self-Locking Nut |
| Washer Outside Diameter | Between 0.402 inches and 0.412 inches |
| Washer Thickness | 0.019 |
| Weight | 0.0033 lb |
| Width Across Flats | Between 0.304 inches and 0.316 inches |
Cross-reference
No interchangeable or dimensionally similar parts are on record for MS21043-4. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error