bolts › close tolerance bolts
AN176-37A
Aeronautical Standard Close Tolerance Bolt
Description
Fastener Length: 3-63/64", Thread: 3/8-24, Thread Length: 11/16", AN176 series bolt
Specifications
| Fastener Length | 3.937 inches minimum and 3.984 inches maximum |
|---|---|
| Grip Diameter | 0.3737 inches minimum and 0.3742 inches maximum |
| Grip Length | 3.296 inches minimum and 3.328 inches maximum |
| Hardness Rating | 26.0 rockwell c minimum and 32.0 rockwell c maximum |
| Head Height | 0.203 inches minimum and 0.235 inches maximum |
| Head Style | Hexagon Head |
| Length | 3 63/64 |
| Material | Steel |
| Material Specification | Mil-b-6812 mil spec all material responses |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416 ty 2 cl 3 fed spec all treatment responses |
| Thread Class | 3a |
| Thread Diameter | 0.375 |
| Thread Direction | Right-hand |
| Thread Length | 0.609 inches minimum and 0.688 inches maximum |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series Designator | UNF |
| Thread Size | 3/8 |
| Width Between Flats | 0.553 inches minimum and 0.565 inches maximum |
Cross-reference
No interchangeable or dimensionally similar parts are on record for AN176-37A. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error