nuts › plain castellated hexagon nuts
MS21244-10
Military Standard Castellated Hexagon Nut
Description
thread: 5/8-18, castellated hexagon nut, right hand unjf 3b, MS21244 series nut
Specifications
| Bearing Surface Finish | 125.0 microinches |
|---|---|
| Counterbore Diameter | 0.760 inches minimum nut and 0.770 inches maximum nut |
| Material | CRES |
| Nondefinitive Specification/Std Data | A grade |
| Nut Counterbore Depth | 0.387 inches minimum nut and 0.407 inches maximum nut |
| Nut Style | Flat with turned back edge |
| Overall Height | 0.792 inches minimum and 0.822 inches maximum |
| Surface Treatment | Cadmium and chromate, Passivate |
| Surface Treatment Specification | Qq-p-35 fed spec single treatment response washer, Qq-p-416 type 2 class 2 fed spec single treatment response nut |
| Temperature Rating | 450.0 deg fahrenheit maximum |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 18 |
| Thread Qty Per Inch (tpi) | 18 |
| Thread Series | UNJF |
| Thread Size | 0.625 |
| Washer Outside Diameter | 1.194 inches minimum and 1.224 inches maximum |
| Width Across Flats | 0.990 inches minimum and 1.002 inches maximum |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- MS21244-4
- MS21244-10
Cross-reference
No interchangeable or dimensionally similar parts are on record for MS21244-10. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error