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MS21087L4
Military Standard Locknut
Description
Thread Size: 1/4", Nut Length: 37/64", Nut Height: 9/32
Specifications
| Counterbore Diameter | 0.254 inches nut |
|---|---|
| Distance From Aperture Center To Mounting Hole Center | Between 0.276 inches and 0.286 inches |
| Hardness Rating | 49.0 rockwell c |
| Locking Feature | Prevailing torque all metal design |
| Lubrication | Dry film lubricant |
| Material | Iron |
| Material Specification | Ams 5732 assn standard single material response or ams 5731 assn standard single material response |
| Mounting Hole Arrangement Style | 2 holes |
| Mounting Hole Diameter | Between 0.098 inches and 0.103 inches |
| Nut Counterbore Depth | 0.062 inches nut |
| Nut Height | 0.281 |
| Nut Length | 0.591 |
| Nut Mounting Provision | Straight holes |
| Nut Style | Plate |
| Plate Thickness | 0.055 |
| Plate Width | Between 0.380 inches and 0.414 inches |
| Temperature Rating | 450.0 degrees fahrenheit |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | Unf (fine thread) |
| Thread Size | 0.250 |
Cross-reference
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Catalog data updated 2026-07-05. Report a data error