nuts › self-locking hexagon nuts
MS21083C4
Military Standard Locking Hexagon Nut Self
Description
Nut
Specifications
| Alternate Part Number | AN364C428 |
|---|---|
| Bearing Surface Finish | 125 microinches |
| Bearing Surface Type | Chamfered or washer faced |
| Countersink Angle | 88 degrees |
| Criticality Code Justification | Feat |
| Locking Feature | Prevailing torque with nonmetallic insert |
| Material | CRES |
| NIIN | 00-897-6145 |
| NSN | 5310-00-897-6145 |
| Nut Height | 0.219 |
| Nut Style | Hexagon |
| Special Features | Weapon system essential |
| Surface Treatment | Passivate except insert |
| Surface Treatment Specification | Qq-p-35 federal specification single treatment response except insert |
| Temperature Rating | 250 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 | 0.25 |
| Weight | .005 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
Interchangeable
Parts that share a National Stock Number or are listed as an alternate for MS21083C4 — functionally equivalent.
- AN364C428 Listed alternate CRES
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- BACN10JC4CD BAC 1/4-28 · Iron
- NAS679A4 NAS 1/4-28 · Steel
- NAS679C4M NAS 1/4-28 · CRES
- NAS679C4MW NAS 1/4-28 · Iron
- NAS679C4W NAS 1/4-28 · Iron
- MS21083D4 MS 1/4-28 · Aluminum
Looking for a specific part? Use the cross-reference lookup.
Catalog data updated 2026-07-05. Report a data error