Aeronautical Standard - Bolt - AN7-40A
Standard Part
Description: Bolt
Part Number: AN7-40A
Item Description
An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. the threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. a locking feature may be incorporated in the design of the head or threads. head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. for items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, bolt, shear. See also screw, cap, hexagon head and screw, machine.
Features and Characteristics
| Thread Class | : | 3a |
| Thread Direction | : | Right-hand |
| Thread Length | : | Between 0.625 inches and 0.704 inches |
| Fastener Length | : | Between 4.078 inches and 4.125 inches |
| Head Style | : | Hexagon |
| Head Height | : | Between 0.234 inches and 0.266 inches |
| Width Between Flats | : | Between 0.615 inches and 0.627 inches |
| Thread Diameter | : | 0.438 inches |
| Grip Length | : | Between 3.421 inches and 3.453 inches |
| Features Provided | : | Finished head |
| Thready Qty Per Inch (tpi) | : | 20 |
| Min. Tensile Strength (psi) | : | 125000 pounds per square inch |
| Hardness Rating | : | 26.0 rockwell c and 32.0 rockwell c |
| Material | : | Steel comp 4140 or steel comp 8740 or steel comp 8630 or steel comp 8735 or steel comp 4130 or steel comp 4037 |
| 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 |
| Surface Treatment | : | Cadmium and chromate |
| Surface Treatment Specification | : | Qq-p-416, type 2 class 3 federal specification all treatment responses |
| Thread Series Designator | : | Unf |
| FSC | : | 5306 Bolts |
| NIIN | : | 006807389 |
| NSN | : | 5306006807389 |