bolts › machine bolts
NAS501-4H3A
Bolt
Description
Fastener Length: 1/2", Hole Diameter: 1/32", Thread: 1/4-28, Thread Length: 29/64"
Specifications
| Fastener Length | 0.453 inches minimum and 0.500 inches maximum |
|---|---|
| Features Provided | Finished head |
| Grip Length | 0.047 inches minimum and 0.078 inches maximum |
| Head Height | 0.140 inches minimum and 0.170 inches maximum |
| Head Style | Hexagon Head |
| Hole Configuration Style | Hexagon longitudinal hole |
| Hole Diameter | 0.046 |
| Hole Quantity | 1 |
| Hole Type | Drilled |
| Length | 1/2 |
| Material | CRES |
| Material Specification | Qq-s-763 fed spec all material responses |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.304 inches minimum and 0.453 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
| Width Between Flats | 0.428 inches minimum and 0.440 inches maximum |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- NAS501-4H3A
- NAS501-4H4A
- NAS501-4H5A
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS501-4H3A. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error