bolts › close tolerance bolts
AN174-41
Aeronautical Standard Close Tolerance Bolt
Description
Fastener Length: 4-1/8", Thread: 1/4-28, Thread Length: 7/16", hex head, drilled shank, AN174 series bolt
Specifications
| Fastener Length | 4.156 |
|---|---|
| Grip Diameter | Between 0.2487 inches and 0.2492 inches |
| Grip Length | 3.688 |
| Hardness Rating | 26.0 rockwell c and 32.0 rockwell c |
| Head Height | Between 0.140 inches and 0.172 inches |
| Head Style | Hexagon Head |
| Material | Steel |
| Material Specification | Mil-s-5626 military specification 1st material response or mil-s-6049 military specification 2nd material response or mil-s-6050 military specification 3rd material response or mil-s-6098 military specification 4th material response or mil-s-6758 military specification 5th material response or ams 6300 assn standard 6th material response |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| Shank Unthreaded Hole Diameter | 0.076 inches first hole |
| Surface Finish | 63.0 microinches grip, 63.0 microinches surface of head |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416 type 2 class 3 federal specification all treatment responses |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.468 |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNF |
| Thread Series Designator | Unf (fine thread) |
| Thread Size | 1/4 |
| Width Between Flats | Between 0.428 inches and 0.440 inches |
Cross-reference
No interchangeable or dimensionally similar parts are on record for AN174-41. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error