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AN173-5
Aeronautical Standard Close Tolerance Bolt
Description
Close Tolerance Bolt
Specifications
| Country of Origin | USA |
|---|---|
| Distance From Head Largest Bearing Surface To Shank Hole Center | 0.516 inches nominal first hole |
| Drilling | Drilled Head |
| Fastener Length | 0.656 |
| Grip | 1/4 in |
| Grip Diameter | 0.1889 inches minimum and 0.1894 inches maximum |
| Grip Length | 0.250 |
| 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 |
| Head Type | Hexagon |
| Industry Standards/Certification | AN173 |
| Length | 21/32 in, 5/8 |
| Material | Steel |
| Material Specification | Mil-s-6049 mil spec 1st material response or mil-s-6050 mil spec 2nd material response or mil-s-6098 mil spec 3rd material response or mil-s-5626 mil spec 4th material response or mil-s-6758 mil spec 5th material response or ams 6300 assn std 6th material response |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| NIIN | 00-180-1783 |
| NSN | 5306-00-180-1783 |
| Shank Unthreaded Hole Diameter | 0.070 inches nominal first hole |
| Surface Finish | 63.0 microinches bearing surface of head, 63.0 microinches grip |
| 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 | 0.406 inches minimum |
| 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.
- AN173-5A AN 32.00-32 · 21/32 in · Hexagon Head · Steel
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Catalog data updated 2026-07-05. Report a data error