bolts › machine bolts
AN3-37A
Aeronautical Standard Machine Bolt
Description
Airframe Bolt
Specifications
| Country of Origin | USA |
|---|---|
| Drilling | Undrilled Head |
| Fastener Length | 3.891 inches minimum and 3.938 inches maximum |
| Features Provided | Finished head |
| Grip | 3.500 in |
| Grip Length | 3 1/2, 3.484 inches minimum and 3.516 inches maximum |
| Hardness Rating | 26.0 rockwell c minimum and 32.0 rockwell c maximum |
| Head Height | 0.109 inches minimum and 0.141 inches maximum |
| Head Style | Hexagon Head |
| Industry Standards/Certification | AN3 |
| Length | 3 15/16, 3 29/32 in |
| Material | Steel |
| Material Specification | Mil-s-5626 mil spec 1st material response or mil-s-6049 mil spec 2nd material response or mil-s-6098 mil spec 3rd material response or mil-s-6758 mil spec 4th material response or ams 6300 assn std 5th material response |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| NIIN | 00-145-7701 |
| NSN | 5306-00-145-7701 |
| Nominal Length | 3 29/32 |
| 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 | 0.190 |
| Thread Direction | Right-hand |
| Thread Length | 0.374 inches minimum and 0.453 inches maximum |
| Thread Qty | 32 |
| Thread Qty Per Inch (tpi) | 32 |
| Thread Series Designator | UNF |
| Thread Size | 10-32 |
| Weight | 0.035 lb |
| Width Between Flats | 0.365 inches minimum and 0.377 inches maximum |
Cross-reference
No interchangeable or dimensionally similar parts are on record for AN3-37A. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error