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AN7-44
Aeronautical Standard Bolt
Description
Airframe Bolt
Specifications
| Country of Origin | USA |
|---|---|
| Distance From Head Largest Bearing Surface To Shank Hole Center | 4.422 inches nominal first hole |
| Drilling | Drilled Head |
| Fastener Length | 4.594 |
| Features Provided | Finished head |
| Grip | 3 15/16 in |
| Grip Length | 3 15/16, 3.938 |
| Hardness Rating | 26.0 rockwell c minimum and 32.0 rockwell c maximum |
| Head Height | 0.234 inches minimum and 0.266 inches maximum |
| Head Style | Hexagon Head |
| Head Type | Hexagon |
| Industry Standards/Certification | AN7 |
| Length | 4 19/32 in |
| Material | Steel |
| Material Specification | Mil-b-6812 mil spec all material responses |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| NIIN | 00-156-2657 |
| NSN | 5306-00-156-2657 |
| Nominal Length | 4 19/32 |
| Shank Unthreaded Hole Diameter | 0.106 inches nominal first hole |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416,type 2,class 3 fed spec all treatment responses |
| Thread Class | 3a |
| Thread Diameter | 0.438 |
| Thread Direction | Right-hand |
| Thread Length | 0.656 inches minimum |
| Thread Qty | 20 |
| Thread Qty Per Inch (tpi) | 20 |
| Thread Series Designator | UNF |
| Thread Size | 7/16-20 |
| Weight | .005 lb |
| Width Between Flats | 0.615 inches minimum and 0.627 inches maximum |
Cross-reference
Interchangeable
Parts that share a National Stock Number or are listed as an alternate for AN7-44 — functionally equivalent.
- MS20073-04-04 Listed alternate 1/4-28 · 19/32 in · Hexagon Head · Steel
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- AN7-44A AN 7/16-20 · 7/64 in · Hexagon Head · Steel
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Catalog data updated 2026-07-05. Report a data error