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AN25-34
Aeronautical Standard Bolt
Description
Fastener Length: 2-3/16", Thread: 1/4-24, Thread Length: 25/64"
Specifications
| Distance From Head Largest Bearing Surface To Shank Hole Center | 1.984 inches minimum first hole and 2.016 inches maximum first hole |
|---|---|
| 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 | 0.140 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 |
| Shank Unthreaded Hole Diameter | 0.076 inches minimum first hole and 0.086 inches maximum first hole |
| 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 all treatment responses |
| 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 |
Cross-reference
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Catalog data updated 2026-07-05. Report a data error