nuts › self-locking nutplates
MS21052L4
Military Standard Locking Plate Nut Self
Description
1/4-28 thread - self-locking nutplate - one lug low height - corrosion resistant steel - 450°, - with dry film lube - plain rivet holes
Specifications
| Alternate Part Number | NS682C4M |
|---|---|
| Center To Center Distance Between Mounting Holes Along Length | 0.310 inches minimum and 0.314 inches maximum |
| Counterbore Diameter | 0.254 inches minimum nut |
| Distance From Aperture Center To Mounting Hole Center | 0.339 inches minimum and 0.349 inches maximum |
| Hardness Rating | 49.0 rockwell c maximum |
| Locking Feature | Prevailing torque all metal design |
| Lubrication | Dry film lubricant |
| Material | Iron |
| Material Specification | Ams 5525 assn std single material response or ams 5735 assn std single material response or ams 5737 assn std single material response |
| Mounting Hole Arrangement Style | 2 holes |
| Mounting Hole Diameter | 0.098 inches minimum and 0.103 inches maximum |
| NIIN | 00-732-0769 |
| NSN | 5310-00-732-0769 |
| Nut Counterbore Depth | 0.062 inches minimum nut |
| Nut Height | 0.281 inches maximum |
| Nut Length | 0.993 inches maximum |
| Nut Mounting Provision | Straight holes |
| Nut Style | Plate |
| Plate Thickness | 0.055 inches maximum |
| Plate Width | 0.375 inches minimum and 0.414 inches maximum |
| Temperature Rating | 450.0 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 |
| Weight | 0.0055 lb |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- MS21052L3
- MS21052L4
- MS21052L08
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.
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- MS21048-4 MS 1/4-28 · Iron
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- MS21048L4 MS 1/4-28 · CRES
- MS21051-4 MS 1/4-28 · Steel
- MS21051L4 MS 1/4-28 · Steel
- MS21052-4 MS 1/4-28 · Iron
Looking for a specific part? Use the cross-reference lookup.
Catalog data updated 2026-07-05. Report a data error