nuts › self-locking nutplates
MS21059L4
Floating Anchor Nut F5000-4
Description
1/4-28 thread, self locking, two lug floating, low height, cadmium plated carbon steel, with dry film lube, plain rivet holes, MS21059 series nut
Specifications
| Center To Center Distance Between Mounting Holes Along Length | Between 0.998 inches and 1.002 inches |
|---|---|
| Distance From Aperture Center To Mounting Hole Center | Between 0.495 inches and 0.505 inches |
| Features Provided | Floating nut |
| Hardness Rating | 49.0 rockwell c |
| Locking Feature | Prevailing torque all metal design |
| Lubrication | Dry film lubricant |
| Material | Steel |
| Mounting Hole Arrangement Style | 2 holes |
| Mounting Hole Diameter | Between 0.098 inches and 0.103 inches |
| NIIN | 00-777-5793 |
| NSN | 5310-00-777-5793 |
| Nut Height | 0.281 |
| Nut Length | 1.292 |
| Nut Mounting Provision | Straight holes |
| Nut Style | Plate |
| Part No. One Lug | MS21061L4 |
| Part No. Two Lug | MS21059L4 |
| Plate Thickness | 0.032 |
| Plate Width | Between 0.350 inches and 0.516 inches |
| Surface Treatment | Cadmium |
| Surface Treatment Specification | Class 3 federal specification single treatment response type 2 qq-p-416 |
| Temperature Rating | 450 degrees fahrenheit |
| Thread | 1/4-28 |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | Unjf (fine thread with external controlled root radius) |
| Thread Size | 0.250 |
| Weight | 0.0081 lb |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
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Catalog data updated 2026-07-05. Report a data error