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NAS1726-4D
Locking Assembled Washer Nut Self
Description
Thread Size: 1/4", Head Width: 1/4
Specifications
| Bearing Surface Finish | 125.0 microinches |
|---|---|
| Counterbore Diameter | 0.277 inches nut and 0.287 inches nut |
| Hardness Rating | Washer rockwell c scale 40 min and rockwell c scale 45 max nut rockwell c scale 36 min and rockwell c scale 40 max |
| Locking Feature | Prevailing torque all metal design |
| Lubrication | Dry film lubricant |
| Material | Steel |
| Nut Counterbore Depth | 0.072 inches nut and 0.087 inches nut |
| Nut Style | Flat with turned up edge |
| Overall Height | Between 0.271 inches and 0.291 inches |
| Specification Data | 80205-nas1726 professional/industrial association standard |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416 type 2 class 2 federal specification single treatment response |
| Temperature Rating | 450.0 degrees fahrenheit |
| 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 |
| Washer Outside Diameter | 0.460 |
| Width Across Flats | Between 0.274 inches and 0.284 inches |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1726-4D. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error