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MS21044D4
Military Standard Locking Hexagon Nut Self
Description
Nut
Specifications
| Bearing Surface Finish | 125.0 microinches |
|---|---|
| Bearing Surface Type | Chamfered or washer faced |
| Countersink Angle | 88.0 degrees nut |
| Locking Feature | Prevailing torque with nonmetallic insert |
| Lubrication | Soluble lubricant |
| Material | Aluminum |
| Material Specification | T6 federal specification 4th material response nut t6 federal specification 3rd material response nut or qq-a-200/11 t4 federal specification 2nd material response nut or qq-a-225/6 t6 federal specification 1st material response nut or qq-a-225/5 qq-a-200/2 |
| NIIN | 00-857-4960 |
| NSN | 5310-00-857-4960 |
| Nut Height | 0.240 mils and 0.360 centimeters |
| Nut Style | Hexagon |
| Surface Treatment | Anodize except insert and chromate except insert |
| Temperature Rating | 250.0 degrees fahrenheit |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | Unjf (fine thread with external controlled root radius) |
| Thread Size | 0.250 |
| Weight | 0.0035 lb |
| Width Across Flats | Between 0.430 inches and 0.439 inches |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- MS21045L4 MS 1/4-28 · Steel
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Catalog data updated 2026-07-05. Report a data error