nuts › plain hexagon nuts
AS5178-03
Plain Hexagon Nut
Description
Thread Size: 3/8", Nut Height: 1/4", Head Width: 5/8
Specifications
| Bearing Surface Type | Chamfered |
|---|---|
| Countersink Angle | 90.0 degrees nut |
| Material | Steel |
| Material Specification | Qq-s-637 federal specification 1st material response or qq-s-637 federal specification 2nd material response or mil-s-6758 military specification 3rd material response or mil-s-5626 military specification 4th material response |
| Nut Height | 0.219 |
| Nut Style | Hexagon |
| 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 | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series | Unf (fine thread) |
| Thread Size | 0.375 |
| Width Across Flats | Between 0.621 inches and 0.628 inches |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
Interchangeable
Parts that share a National Stock Number or are listed as an alternate for AS5178-03 — functionally equivalent.
- AN824-3 Listed alternate 3/8 in · Steel
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