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AN5C21A
Aeronautical Standard Machine Bolt
Description
Fastener Length: 2-1/4", Thread: 1/4-24, Thread Length: 37/64", AN5 series bolt
Specifications
| Fastener Length | 2.203 inches minimum and 2.250 inches maximum |
|---|---|
| Features Provided | Finished head |
| Grip Length | 1.672 inches minimum and 1.703 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 |
| Length | 2 1/4 |
| Material | Steel |
| Material Specification | Mil-s-18732 mil spec single material response |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| Surface Treatment | Passivate |
| Thread Class | 3a |
| Thread Diameter | 0.312 |
| Thread Direction | Right-hand |
| Thread Length | 0.500 inches minimum and 0.578 inches maximum |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
| Width Between Flats | 0.490 inches minimum and 0.502 inches maximum |
Cross-reference
No interchangeable or dimensionally similar parts are on record for AN5C21A. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error