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AN25-34A
Aeronautical Standard Bolt
Description
Fastener Length: 2-3/16", Thread: 1/4-24, Thread Length: 25/64"
Specifications
| Departure From Cited Document | Thread t per mil-s-7742 except major dia is not to exceed max allow shank bolt dia |
|---|---|
| Fastener Length | 2.156 inches minimum and 2.188 inches maximum |
| Groove Diameter | 0.245 inches minimum and 0.255 inches maximum |
| Hardness Rating | 26.0 rockwell c minimum and 32.0 rockwell c maximum |
| Head Diameter | 0.609 inches minimum and 0.641 inches maximum |
| Head Height | 0.141 inches minimum and 0.172 inches maximum |
| Head Style | Button |
| Internal Drive Style | Slot |
| Length | 2 3/16 |
| Material | Steel |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| Single Shear Strength | 5750 pounds per square inch |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416 ty 2 cl 3 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.312 |
| Thread Direction | Right-hand |
| Thread Length | 0.328 inches minimum and 0.392 inches maximum |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
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Catalog data updated 2026-07-05. Report a data error