nuts › self-locking hexagon nuts
MS21083B04
Military Standard Locking Hexagon Nut Self
Description
Thread Size: 7/64", Nut Height: 1/8", Head Width: 15/64", locknut, MS21083 series nut
Specifications
| Bearing Surface Finish | 125.0 microinches |
|---|---|
| Bearing Surface Type | Chamfered or washer faced |
| Countersink Angle | 88.0 degrees minimum nut |
| Locking Feature | Prevailing torque with nonmetallic insert |
| Lubrication | Soluble lubricant |
| Material | Copper |
| Nut Height | 0.125 inches maximum |
| Nut Style | Hexagon |
| Surface Treatment | Cadmium except insert and chromate except insert |
| Surface Treatment Specification | Qq-p-416,ty 2,cl 2 fed spec all treatment responses except insert |
| Temperature Rating | 250.0 deg fahrenheit maximum |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 40 |
| Thread Qty Per Inch (tpi) | 40 |
| Thread Series | UNJC |
| Thread Size | 0.112 |
| Width Across Flats | 0.243 inches minimum and 0.251 inches maximum |
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.
- NAS679A04W NAS #4-40 · Steel
- NAS679C04M NAS #4-40 · Iron
- NAS679C04W NAS #4-40 · Iron
- MS21083C04 MS #4-40 · CRES
- MS21083N04 MS #4-40 · Plastic
Looking for a specific part? Use the cross-reference lookup.
Catalog data updated 2026-07-05. Report a data error