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AN174C22
Aeronautical Standard Bolt
Description
Fastener Length: 2-1/4", Thread: 1/4-28, Thread Length: 15/32"
Specifications
| Distance From Head Largest Bearing Surface To Shank Hole Center | 2.124 inches nominal first hole |
|---|---|
| Fastener Length | 2.281 |
| Grip Diameter | 0.2487 inches minimum and 0.2492 inches maximum |
| Grip Length | 1.812 |
| 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 | 2 1/4 |
| 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 nominal first hole |
| Surface Finish | 63.0 microinches bearing surface of head, 63.0 microinches grip |
| Surface Treatment | Passivate |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.469 inches minimum |
| 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
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- AN174-22A AN 1/4-28 · 0.086 in · Hexagon Head · Steel
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Catalog data updated 2026-07-05. Report a data error