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AN5-26A
Aeronautical Standard Machine Bolt
Description
Airframe Bolt; Undrilled Shank
Specifications
| Country of Origin | USA |
|---|---|
| Drilling | Undrilled Head |
| Fastener Length | 2.844 |
| Features Provided | Finished head |
| Grip | 2 5/16 in |
| Grip Length | 2 5/16, 2.312 |
| Hardness Rating | 26.0 rockwell c minimum and 32.0 rockwell c maximum |
| Head Height | 0.172 inches minimum and 0.204 inches maximum |
| Head Style | Hexagon Head |
| Industry Standards/Certification | AN5 |
| Length | 2 27/32 in |
| Material | Steel |
| Material Specification | Mil-b-6812 mil spec all material responses |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| NIIN | 00-151-2617 |
| NSN | 5306-00-151-2617 |
| Nominal Length | 2 27/32 |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416,ty 2,class 3 fed spec all treatment responses |
| Thread Class | 3a |
| Thread Diameter | 0.312 |
| Thread Direction | Right-hand |
| Thread Length | 0.532 inches minimum |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series Designator | UNF |
| Thread Size | 1/4, 5/16-24 |
| Weight | 0.07 lb |
| Width Between Flats | 0.490 inches minimum and 0.502 inches maximum |
Cross-reference
No interchangeable or dimensionally similar parts are on record for AN5-26A. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error