nuts › self-locking hexagon nuts
MS20500-720A
Military Standard Locknut
Description
Thread Size: 1/2", Nut Height: 1/2", Head Width: 5/8"
Specifications
| Bearing Surface Finish | 125.0 microinches |
|---|---|
| Bearing Surface Type | Chamfered |
| Countersink Angle | 88.0 degrees nominal nut |
| Locking Feature | Prevailing torque all metal design |
| Material | Steel |
| Material Specification | Ams 5642 s34720/s34723 assn std single material response |
| Nut Height | 0.421 inches minimum and 0.469 inches maximum |
| Nut Style | Hexagon |
| Precious Material | Silver |
| Precious Material And Location | All surfaces silver |
| Surface Treatment | Silver |
| Surface Treatment Specification | Ams 2410 assn std single treatment response |
| Temperature Rating | 1200.0 deg fahrenheit |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 20 |
| Thread Qty Per Inch (tpi) | 20 |
| Thread Series | UNJF |
| Thread Size | 0.438 |
| Width Across Flats | 0.679 inches minimum and 0.690 inches maximum |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- MS20500-428
- MS20500-524
- MS20500-624
- MS20500-720A
- MS20500-918
- MS20500-1032
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.
Looking for a specific part? Use the cross-reference lookup.
Catalog data updated 2026-07-05. Report a data error