nuts › self-locking hexagon nuts
MS21083C18
Military Standard Nut
Description
Thread Size: 1-1/8", Nut Height: 43/64", Head Width: 1-39/64"
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 | Plastic |
| Nut Height | 0.672 inches maximum |
| Nut Style | Hexagon |
| Surface Treatment | Passivate except insert |
| Surface Treatment Specification | Qq-p-35 fed spec single treatment response except insert |
| Temperature Rating | 250.0 deg fahrenheit maximum |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 12 |
| Thread Qty Per Inch (tpi) | 12 |
| Thread Series | UNJF |
| Thread Size | 1.125 |
| Width Across Flats | 1.614 inches minimum and 1.627 inches maximum |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
No interchangeable or dimensionally similar parts are on record for MS21083C18. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error