nuts › self-locking hexagon nuts
MS21045C7
Military Standard Locking Hexagon Nut Self
Description
7/16-20 thread self-locking regular height corrosion resistant steel nut, with dry film lube
Specifications
| Bearing Surface Finish | 125.0 microinches |
|---|---|
| Bearing Surface Type | Chamfered or washer faced |
| Countersink Angle | 88.0 degrees nut |
| Locking Feature | Prevailing torque all metal design |
| Lubrication | Dry film lubricant |
| Material | CRES |
| NIIN | 00-857-5561 |
| NSN | 5310-00-857-5561 |
| Nut Height | 0.435 mils and 0.469 centimeters |
| Nut Style | Hexagon |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 federal specification single treatment response |
| Temperature Rating | 450.0 degrees fahrenheit |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty Per Inch (tpi) | 20 |
| Thread Series | Unjf (fine thread with external controlled root radius) |
| Thread Size | 0.438 |
| Weight | 0.03 lb |
| Width Across Flats | Between 0.679 inches and 0.690 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.
- MS21045L7 MS 7/16-20 · Steel
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Catalog data updated 2026-07-05. Report a data error