nuts › self-locking nutplates
MS21069-4
Military Standard Locking Plate Nut Self
Description
1/4-28 thread - self-locking nutplate - two lug reduced rivet spacing low height - cadmium plated carbon steel - 450°,, without dry film lube - plain rivet holes
Specifications
| Center To Center Distance Between Mounting Holes Along Length | 0.560 inches minimum and 0.564 inches maximum |
|---|---|
| Distance From Aperture Center To Mounting Hole Center | 0.281 inches maximum |
| Hardness Rating | 49.0 rockwell c maximum |
| Locking Feature | Prevailing torque all metal design |
| Lubrication | Soluble lubricant |
| Material | Steel |
| Mounting Hole Arrangement Style | 2 holes |
| Mounting Hole Diameter | 0.098 inches minimum and 0.103 inches maximum |
| NIIN | 00-728-7704 |
| NSN | 5310-00-728-7704 |
| Nut Height | 0.281 inches maximum |
| Nut Length | 0.786 inches maximum |
| Nut Mounting Provision | Straight holes |
| Nut Style | Plate |
| Plate Thickness | 0.055 inches maximum |
| Plate Width | 0.380 inches minimum and 0.414 inches maximum |
| Surface Treatment | Cadmium |
| Surface Treatment Specification | Qq-p-416,ty 2,cl 3 fed spec single treatment response |
| 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 | 0.0035 lb |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
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Catalog data updated 2026-07-05. Report a data error