nuts › plain castellated hexagon nuts
AN310-18
Aeronautical Standard Plain Castellated Hexagon Nut
Description
Thread Size: 1-1/8", Nut Height: 1-1/8", Head Width: 1-5/8", AN310 series nut
Specifications
| Bearing Surface Type | Washer faced |
|---|---|
| Countersink Angle | 109.0 degrees nut and 111.0 degrees nut |
| Hardness Rating | Between 80.0 rockwell b and 32.0 rockwell c |
| Material | Steel |
| Nondefinitive Specification/Std Data | 5 type and a grade |
| Nut Height | Between 1.141 inches and 1.172 inches |
| Nut Style | Hexagon castellated |
| Surface Treatment | Cadmium |
| Surface Treatment Specification | Cl 2 federal specification single treatment response type 2 qq-p-416 |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 12 |
| Thread Qty Per Inch (tpi) | 12 |
| Thread Series | Unf (fine thread) |
| Thread Size | 1.125 |
| Width Across Flats | Between 1.667 inches and 1.690 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 AN310-18. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error