bolts › close tolerance bolts
AN173-6A
Aeronautical Standard Close Tolerance Bolt
Description
Close Tolerance Bolt
Specifications
| Country of Origin | USA |
|---|---|
| Drilling | Undrilled Head |
| Fastener Length | 0.781 |
| Grip | 3/8 in |
| Grip Diameter | 0.1889 inches minimum and 0.1894 inches maximum |
| Grip Length | 0.375 |
| Head Height | 0.109 inches minimum and 0.141 inches maximum |
| Head Style | Hexagon Head |
| Head Type | Hexagon |
| Industry Standards/Certification | AN173 |
| Length | 25/32 in, 3/4 |
| Material | Steel |
| NIIN | 01-501-5640 |
| NSN | 5306-01-501-5640 |
| Special Features | Undrilled bolt |
| Surface Treatment | Cadmium |
| Surface Treatment Specification | Qq-p-416, ty2cl3 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.190 |
| Thread Direction | Right-hand |
| Thread Length | 0.406 |
| Thread Qty | 32 |
| Thread Qty Per Inch (tpi) | 32 |
| Thread Series Designator | UNF |
| Thread Size | 0.1900-32, 10 |
| Weight | 0.01 lb |
| Width Between Flats | 0.365 inches minimum and 0.377 inches maximum |
Cross-reference
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- AN173-6 AN 32.00-32 · 25/32 in · Hexagon Head · Steel
Looking for a specific part? Use the cross-reference lookup.
Catalog data updated 2026-07-05. Report a data error