nuts › plain hexagon nuts
AS5178K20
Plain Hexagon Nut
Description
Thread Size: 1-5/8", Nut Height: 3/8", Head Width: 1-61/64"
Specifications
| Bearing Surface Type | Chamfered |
|---|---|
| Countersink Angle | 90.0 degrees nominal nut |
| Material | CRES |
| Material Specification | Qq-s-763 fed spec single material response |
| Nut Height | 0.406 |
| Nut Style | Hexagon |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Mil-s-5002 mil spec single treatment response |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 12 |
| Thread Qty Per Inch (tpi) | 12 |
| Thread Series | UN |
| Thread Size | 1.625 |
| Width Across Flats | 1.922 inches minimum and 1.954 inches maximum |
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 AS5178K20. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error