bolts › close tolerance bolts
AN175-22A
Aeronautical Standard Close Tolerance Bolt
Description
Close Tolerance Bolt
Specifications
| Country of Origin | USA |
|---|---|
| Drilling | Undrilled Head |
| Fastener Length | 2.344 |
| Grip | 1 13/16 in |
| Grip Diameter | Between 0.3112 inches and 0.3117 inches |
| Grip Length | 1.812 |
| Hardness Rating | 26.0 rockwell c and 32.0 rockwell c |
| Head Height | Between 0.172 inches and 0.204 inches |
| Head Style | Hexagon Head |
| Head Type | Hexagon |
| Hole Configuration Style | Hexagon longitudinal hole |
| Hole Diameter | 0.07 |
| Hole Quantity | 1 |
| Hole Type | Drilled |
| Industry Standards/Certification | AN175 |
| Length | 2 11/32 in |
| Material | Steel |
| Material Specification | Mil-s-6049 military specification 1st material response or mil-s-6050 military specification 2nd material response or mil-s-6098 military specification 3rd material response or mil-s-5626 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 |
| NIIN | 00-144-4051 |
| NSN | 5306-00-144-4051 |
| Surface Finish | 63.0 microinches grip, 63.0 microinches surface of head |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Class 3 federal specification single treatment response type 2 qq-p-416 |
| Thread Class | 3a |
| Thread Diameter | 0.312 |
| Thread Direction | Right-hand |
| Thread Length | 0.532 |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series | UNF |
| Thread Series Designator | Unf (fine thread) |
| Thread Size | 0.3125-24, 1/4 |
| Weight | 0.06 lb |
| Width Between Flats | Between 0.490 inches and 0.502 inches |
Cross-reference
No interchangeable or dimensionally similar parts are on record for AN175-22A. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error