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AN4CH12
Aeronautical Standard Bolt
Description
Fastener Length: 1-5/16", Thread: 1/4-28, Thread Length: 1/2"
Specifications
| Departure From Cited Designator | One |
|---|---|
| Distance From Head Largest Bearing Surface To Shank Hole Center | 1.109 inches minimum first hole and 1.141 inches maximum first hole |
| Fastener Length | 1.266 inches minimum and 1.312 inches maximum |
| Features Provided | Finished head |
| Grip Length | 0.797 inches minimum and 0.828 inches maximum |
| Hardness Rating | 26.0 rockwell c minimum and 32.0 rockwell c maximum |
| Head Height | 0.140 inches minimum and 0.172 inches maximum |
| Head Style | Hexagon Head |
| Length | 1 5/16 |
| Material | Steel |
| Material Specification | Mil-s-18732 mil spec single material response |
| 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 |
| Surface Treatment | Passivate |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Length | 0.438 inches minimum and 0.515 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
| Width Between Flats | 0.428 inches minimum and 0.440 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 AN4CH12. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error