bolts › close tolerance bolts
AN175CH21A
Aeronautical Standard Bolt
Description
Fastener Length: 11/32", Thread: 1/4-24, Thread Length: 1/4"
Specifications
| Fastener Length | 0.359 |
|---|---|
| Grip Diameter | 0.311 |
| Grip Length | 2.203 inches minimum and 2.250 inches maximum |
| Head Height | 0.172 inches minimum and 0.204 inches maximum |
| Head Style | Hexagon Head |
| Length | 11/32 |
| Material | Steel |
| Thread Class | 3a |
| Thread Diameter | 0.312 |
| Thread Direction | Right-hand |
| Thread Length | 0.312 |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
| Width Between Flats | 0.490 inches minimum and 0.502 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 AN175CH21A. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error