nuts › plain slotted hexagon nuts
AN320-5
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 | 0.500 in |
| Dimension A Tolerance | +0.002 in |
| Dimension B | 0.578 in |
| Dimension H | 0.188 in |
| End Application | T56-a-7/15 (c-130b/e/h/n/p) aircraft mh-53e; joint stars target radar system; engine c-2a (reprocured); helicopter b-52h); aircraft aircraft tf33-p-3/5/9 (c/ec-135 tf-33-p-7 (c-141a/b); engine aircraft ec-135h/k/p); engine aircraft tf33-pw-102 (c-135e t-2; engine f100-pw-200(f-16a/b/c/d); aircraft aircraft hc-130); engine ec-130e mc-130h w/s:aircraft (ac-130h |
| Industry Standards/Certification | AN320 |
| Material | Steel |
| Minimum Ultimate Tensile Strength (Steel) | 3250 lb |
| NIIN | 00-176-8109 |
| NSN | 5310-00-176-8109 |
| Nut Height | Between 0.172 inches and 0.203 inches |
| Nut Style | Hexagon slotted |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Cl 3 federal specification single treatment response type 2 qq-p-416 |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series | Unf (fine thread) |
| Thread Size | 0.312, 5/16-24 |
| Thread T | 0.3125-24 |
| Type | Cad Plated, Shear Castellated |
| Weight | 0.0063 lb |
| Width Across Flats | Between 0.490 inches and 0.502 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.
Looking for a specific part? Use the cross-reference lookup.
Catalog data updated 2026-07-05. Report a data error