bolts › close tolerance bolts
AN176-22
Aeronautical Standard Close Tolerance Bolt
Description
Close Tolerance Bolt
Specifications
| Country of Origin | USA |
|---|---|
| Distance From Head Largest Bearing Surface To Shank Hole Center | 2.124 inches first hole |
| Drilling | Drilled Head |
| Fastener Length | 2.328 |
| Grip | 1 11/16 in |
| Grip Diameter | Between 0.3742 inches and 0.3787 inches |
| Grip Length | 1.687 |
| Head Height | Between 0.203 inches and 0.235 inches |
| Head Style | Hexagon Head |
| Head Type | Hexagon |
| Industry Standards/Certification | AN176 |
| Length | 2 21/64 in |
| Material | Steel |
| NIIN | 00-051-6874 |
| NSN | 5306-00-051-6874 |
| Shank Unthreaded Hole Diameter | 0.106 inches first hole and 0.116 inches first hole |
| Surface Finish | 63.0 microinches bearing surface of head, 63.0 microinches grip |
| Thread Class | 3a |
| Thread Diameter | 0.375 |
| Thread Direction | Right-hand |
| Thread Length | 1.641 |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series Designator | Unf (fine thread) |
| Thread Size | 0.3750-24, 3/8 |
| Weight | 0.09 lb |
| Width Between Flats | Between 0.553 inches and 0.565 inches |
Cross-reference
No interchangeable or dimensionally similar parts are on record for AN176-22. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error