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AN173-6
Aeronautical Standard Close Tolerance Bolt
Description
Close Tolerance Bolt
Specifications
| Country of Origin | USA |
|---|---|
| Drilling | Drilled Head |
| Fastener Length | 0.781 |
| Grip | 3/8 in |
| Grip Diameter | Between 0.1889 inches and 0.1894 inches |
| Grip Length | 0.375 |
| Hardness Rating | 26.0 rockwell c and 32.0 rockwell c |
| Head Height | Between 0.109 inches and 0.141 inches |
| Head Style | Hexagon Head |
| Head Type | Hexagon |
| Industry Standards/Certification | AN173 |
| Length | 25/32 in, 3/4 |
| 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 ams 6300 assn standard 4th material response or mil-s-5626 military specification 5th material response or mil-s-6758 military specification 6th material response |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| NIIN | 00-292-6158 |
| NSN | 5306-00-292-6158 |
| Shank Unthreaded Hole Diameter | 0.07 inches first hole |
| Surface Finish | 63 microinches grip, 63 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 | 0.190 |
| Thread Direction | Right-hand |
| Thread Length | 0.406 |
| Thread Qty | 32 |
| Thread Qty Per Inch (tpi) | 32 |
| Thread Series | UNF |
| Thread Series Designator | Unf (fine thread) |
| Thread Size | 0.1900-32, 10 |
| Weight | 0.01 lb |
| Width Between Flats | Between 0.365 inches and 0.377 inches |
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.
- AN173-6A AN 32.00-32 · 25/32 in · Hexagon Head · Steel
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Catalog data updated 2026-07-05. Report a data error