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MS21044B4
Military Standard Locking Hexagon Nut Self
Description
Thread Size: 1/4", Nut Height: 1/4", Head Width: 3/8
Specifications
| Bearing Surface Finish | 125.0 microinches |
|---|---|
| Bearing Surface Type | Chamfered or washer faced |
| Countersink Angle | 88.0 degrees nominal nut |
| Criticality Code Justification | Feat |
| Locking Feature | Prevailing torque with nonmetallic insert |
| Lubrication | Soluble lubricant |
| Material | Copper |
| Nut Height | 0.240 inches minimum and 0.360 inches maximum |
| Nut Style | Hexagon |
| Special Features | Magnetic particle inspection |
| Surface Treatment | Cadmium except insert |
| Surface Treatment Specification | Qq-p-416,ty 2,cl 3 fed spec single treatment response except insert |
| Temperature Rating | 250.0 deg fahrenheit |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNJF |
| Thread Size | 0.250 |
| Width Across Flats | 0.430 inches minimum and 0.439 inches maximum |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- MS21044B3
- MS21044B4
- MS21044B5
- MS21044B6
- MS21044B08
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.
- MS17830-4F MS 1/4-28 · CRES
- MS17830-4F316 MS 1/4-28 · CRES
- MS21044N4 MS 1/4-28 · Steel
Looking for a specific part? Use the cross-reference lookup.
Catalog data updated 2026-07-05. Report a data error