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AN310-4
Aeronautical Standard Plain Castellated Hexagon Nut
Description
Castellated Nut
Specifications
| Dimension A | 0.438 in |
|---|---|
| Dimension A Tolerance | +0.002 in |
| Dimension B | 1/2 in |
| Dimension H | 9/32 in |
| Industry Standards/Certification | AN310 |
| Material | Steel |
| Minimum Ultimate Tensile Strength (Steel) | 4080 lb |
| NIIN | 00-167-1285 |
| NSN | 5310-00-167-1285 |
| Nut Height | Between 0.265 inches and 0.297 inches |
| Nut Style | Hexagon castellated |
| Surface Treatment | Cadmium |
| Surface Treatment Specification | Qq-p-416 type 2 class 3 federal specification single treatment response |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | Unf (fine thread) |
| Thread Size | 0.250, 1/4-28 |
| Thread T | 1/4-28 |
| Type | Cad Plated, Castellated |
| Weight | 0.0059 lb |
| Width Across Flats | Between 0.428 inches and 0.440 inches |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- AN310C4 AN 1/4-28 · CRES
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Catalog data updated 2026-07-05. Report a data error