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AN320-1
Aeronautical Standard Plain Slotted Hexagon Nut
Description
Castellated Nut
Specifications
| Bearing Surface Finish | 125.0 microinches |
|---|---|
| Bearing Surface Type | Chamfered or washer faced |
| Dimension A | 0.313 in |
| Dimension A Tolerance | +0.002 in |
| Dimension B | 0.359 in |
| Dimension H | 0.156 in |
| Industry Standards/Certification | AN320 |
| Material | Steel |
| NIIN | 00-176-8105 |
| NSN | 5310-00-176-8105 |
| Nut Height | Between 0.141 inches and 0.172 inches |
| Nut Style | Hexagon slotted |
| Surface Treatment | Cadmium |
| Surface Treatment Specification | Cl 3 federal specification single treatment response type 2 qq-p-416 |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 40 |
| Thread Qty Per Inch (tpi) | 40 |
| Thread Series | Unf (fine thread) |
| Thread Size | 0.138, 6-40 |
| Thread T | 0.1380-40 |
| Type | Shear Castellated |
| Weight | 0.002 lb |
| Width Across Flats | Between 0.303 inches and 0.315 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 AN320-1. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error