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AN175-12A
Aeronautical Standard Close Tolerance Bolt
Description
Close Tolerance Bolt
Specifications
| Country of Origin | USA |
|---|---|
| Drilling | Undrilled Head |
| Fastener Length | 1.344 |
| Grip | 13/16 in |
| Grip Diameter | 0.311 inches minimum and 0.312 inches maximum |
| Grip Length | 0.812 |
| Hardness Rating | 26.0 rockwell c minimum and 32.0 rockwell c maximum |
| Head Height | 0.172 inches minimum and 0.204 inches maximum |
| Head Style | Hexagon Head |
| Head Type | Hexagon |
| Industry Standards/Certification | AN175 |
| Length | 1 11/32 in |
| Material | Steel |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| NIIN | 00-639-2398 |
| NSN | 5306-00-639-2398 |
| Surface Finish | 63.0 microinches bearing surface of head, 63.0 microinches grip |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416 ty2 cl3 fed spec all treatment responses |
| Thread Class | 3a |
| Thread Diameter | 0.312 |
| Thread Direction | Right-hand |
| Thread Length | 0.531 inches minimum |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series Designator | UNF |
| Thread Size | 0.3125-24, 1/4 |
| Weight | 0.04 lb |
| Width Between Flats | 0.490 inches minimum and 0.502 inches maximum |
Cross-reference
No interchangeable or dimensionally similar parts are on record for AN175-12A. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error