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AN173-21A
Aeronautical Standard Bolt
Description
Fastener Length: 2-3/16", Hole Diameter: 1/32", Thread: 10-32, Thread Length: 29/64"
Specifications
| Distance From Head Largest Bearing Surface To Shank Hole Center | 2.000 inches minimum first hole and 2.032 inches maximum first hole |
|---|---|
| Fastener Length | 2.140 inches minimum and 2.187 inches maximum |
| Grip Diameter | 0.1889 inches minimum and 0.1894 inches maximum |
| Grip Length | 1.734 inches minimum and 1.766 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 |
| Hole Configuration Style | Hexagon flats |
| Hole Diameter | 0.046 |
| Hole Quantity | 1 |
| Hole Type | Drilled |
| Length | 2 3/16 |
| Material | Steel |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| Shank Unthreaded Hole Diameter | 0.070 inches minimum first hole and 0.080 inches maximum 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 | 0.374 inches minimum and 0.453 inches maximum |
| Thread Qty | 32 |
| Thread Qty Per Inch (tpi) | 32 |
| Thread Series Designator | UNF |
| Thread Size | 10 |
| Width Between Flats | 0.365 inches minimum and 0.377 inches maximum |
Cross-reference
No interchangeable or dimensionally similar parts are on record for AN173-21A. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error