nuts › self-locking hexagon nuts
MS21044N7
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 |
| Criticality Code Justification | Feat |
| Locking Feature | Prevailing torque with nonmetallic insert |
| Lubrication | Soluble lubricant |
| Material | Steel |
| NIIN | 00-088-0552 |
| NSN | 5310-00-088-0552 |
| Nut Height | Between 0.435 inches and 0.469 inches |
| Nut Style | Hexagon |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Cl 3 federal specification single treatment response except insert type 2 qq-p-416 |
| Temperature Rating | 250 degrees fahrenheit |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 20 |
| Thread Qty Per Inch (tpi) | 20 |
| Thread Series | Unjf (fine thread with external controlled root radius) |
| Thread Size | 0.438 |
| Weight | 0.027 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.
- MS20500-720A MS 7/16-20 · Steel
- MS21044C7 MS 7/16-20 · Steel
- MS21045-7 MS 7/16-20 · Steel
- MS21046C7 MS 7/16-20 · CRES
- MS21225-7 MS 7/16-20 · Iron
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Catalog data updated 2026-07-05. Report a data error