nuts › plain hexagon nuts
AN121551
Aeronautical Standard Plain Hexagon Nut
Description
Thread Size: 1/4", Nut Height: 1/4", Head Width: 3/8
Specifications
| Bearing Surface Type | Washer faced |
|---|---|
| Countersink Angle | 85.0 degrees minimum nut and 95.0 degrees maximum nut |
| Material | Steel |
| Material Specification | Ams 6322 assn std single material response |
| Nut Height | 0.240 inches minimum and 0.260 inches maximum |
| Nut Style | Castellated, hexagon |
| Surface Treatment | Cadmium |
| Surface Treatment Specification | Ams 2400 assn std single treatment response |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 32 |
| Thread Qty Per Inch (tpi) | 32 |
| Thread Series | UNF |
| Thread Size | 0.190 |
| Width Across Flats | 0.367 inches minimum and 0.376 inches maximum |
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 AN121551. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error