nuts › self-locking nutplates
MS21081-4
Military Standard Locking Plate Nut Self
Description
1/4-28 thread - self-locking - corner nutplate - cadmium plated steel nylon insert, 250°, - plain rivet holes
Specifications
| Alternate Part Number | NAS1027N4 |
|---|---|
| Distance From Aperture Center To Mounting Hole Center | 0.495 inches minimum and 0.505 inches maximum |
| Hardness Rating | 32.0 rockwell c maximum |
| Industry Standards/Certification | MS21081 |
| Insert Material | Nylon |
| Locking Feature | Prevailing torque with nonmetallic insert |
| Material | Plastic |
| Maximum Dimension A | 0.906 in |
| Maximum Dimension B | 0.514 in |
| Maximum Dimension C | 0.500 in |
| Maximum Dimension J | 0.707 in |
| Maximum Height | 0.375 in |
| Mounting Hole Arrangement Style | 2 holes |
| Mounting Hole Diameter | 0.098 inches minimum and 0.103 inches maximum |
| NIIN | 00-728-7709 |
| NSN | 5310-00-728-7709 |
| Nut Height | 0.240 inches minimum and 0.375 inches maximum |
| Nut Length | 0.906 inches maximum |
| Nut Mounting Provision | Straight holes |
| Nut Style | Plate |
| Plate Thickness | 0.075 inches maximum |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416,ty 2,cl 3 fed spec single treatment response nut |
| 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, 1/4-28 |
| Weight | .005 lb |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- MS21081-3
- MS21081-4
- MS21081-06
- MS21081-08
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.
Looking for a specific part? Use the cross-reference lookup.
Catalog data updated 2026-07-05. Report a data error