nuts › plain hexagon nuts
AS5178-20
Nut
Description
Thread Size: 1-5/8", Nut Height: 27/64", Head Width: 1-61/64"
Specifications
| Bearing Surface Type | Chamfered or washer faced |
|---|---|
| Countersink Angle | 89.5 degrees minimum nut and 90.5 degrees maximum nut |
| Departure From Cited Designator | As modified by special test feature |
| Material | Steel |
| Nut Height | 0.391 inches minimum and 0.422 inches maximum |
| Nut Style | Hexagon |
| Surface Treatment | Cadmium |
| Surface Treatment Specification | Qq-p-416,ty 1,cl 2 fed 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
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Catalog data updated 2026-07-05. Report a data error