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AN175-21A
2-7/32 Inch Length AN175 0.3125-24 Thread Hexagon Head Close Tolerance Bolt
Description
2-7/32 Inch Length AN175 0.3125-24 Thread Hexagon Head Close Tolerance Bolt
Specifications
| Drilling | Undrilled Head |
|---|---|
| Fastener Length | 2.203 inches minimum and 2.250 inches maximum |
| Grip | 1 11/16 in |
| Grip Diameter | 0.3112 inches minimum and 0.3117 inches maximum |
| Grip Length | 1.672 inches minimum and 1.704 inches maximum |
| 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 | 2 1/4, 2 7/32 in |
| Material | Steel |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| Surface Finish | 53.0 microinches grip, 63.0 microinches bearing surface of head |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416 ty 2 cl 3 fed spec all treatment responses |
| Thread Class | 3a |
| Thread Diameter | 0.312 |
| Thread Direction | Right-hand |
| Thread Length | 0.499 inches minimum and 0.578 inches maximum |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series Designator | UNF |
| Thread Size | 0.3125-24, 1/4 |
| Weight | 0.07 lb |
| Width Between Flats | 0.490 inches minimum and 0.502 inches maximum |
Cross-reference
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- AN175-21 AN 24.00-24 · 0.086 in · Hexagon Head · Steel
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Catalog data updated 2026-07-05. Report a data error