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AN7-27A
Aeronautical Standard Machine Bolt
Description
Airframe Bolt
Specifications
| Alternate Part Number | 401-521 |
|---|---|
| Country of Origin | USA |
| Drilling | Undrilled Head |
| Fastener Length | Between 2.953 inches and 3.00 inches |
| Features Provided | Finished head |
| Grip | 2 5/16 in |
| Grip Length | 2 5/16, Between 2.297 inches and 2.328 inches |
| Hardness Rating | 26.0 rockwell c and 32.0 rockwell c |
| Head Height | Between 0.234 inches and 0.266 inches |
| Head Style | Hexagon Head |
| Head Type | Hexagon |
| Industry Standards/Certification | AN7 |
| Length | 2 31/32 in |
| Material | Steel |
| Material Specification | Mil-s-5626 military specification 1st material response or mil-s-6049 military specification 2nd material response or mil-s-6050 military specification 3rd material response or mil-s-6098 military specification 4th material response or mil-s-6758 military specification 5th material response or ams 6300 assn standard 6th material response |
| Min. Tensile Strength (psi) | 125000 pounds per square inch |
| NIIN | 00-208-3650 |
| NSN | 5306-00-208-3650 |
| Nominal Length | 2 31/32 |
| 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 | 0.438 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.625 inches and 0.703 inches |
| Thread Qty | 20 |
| Thread Qty Per Inch (tpi) | 20 |
| Thread Series | UNF |
| Thread Series Designator | Unf (fine thread) |
| Thread Size | 7/16-20 |
| Weight | 0.147 lb |
| Width Between Flats | Between 0.615 inches and 0.627 inches |
Cross-reference
No interchangeable or dimensionally similar parts are on record for AN7-27A. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error