Bolt - AN7-43A
Aeronautical Standard
Description: Bolt
Part Number: AN7-43A
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.
length: 4-15/32", grip: 3-13/16", thread: 7/16-20, cadmium plated steel undrilled shank"
Specification:
| Thread Class | : | 3a |
| Thread Direction | : | Right-hand |
| Thread Length | : | 0.625 inches minimum and 0.704 inches maximum |
| Fastener Length | : | 4.453 inches minimum and 4.500 inches maximum |
| Head Style | : | Hexagon |
| Head Height | : | 0.234 inches minimum and 0.266 inches maximum |
| Width Between Flats | : | 0.615 inches minimum and 0.627 inches maximum |
| Thread Diameter | : | 0.438 inches |
| Grip Length | : | 3.796 inches minimum and 3.828 inches maximum |
| Features Provided | : | Finished head |
| Thread Qty Per Inch (tpi) | : | 20 |
| Min. Tensile Strength (psi) | : | 125000 pounds per square inch |
| Hardness Rating | : | 26.0 rockwell c minimum overall and 32.0 rockwell c maximum overall |
| Material | : | Steel comp 4140 overall or steel comp 8740 overall or steel comp 8640 overall or steel comp 8735 overall or steel comp 4130 overall or steel comp 4037 overall |
| Surface Treatment | : | Cadmium overall and chromate overall |
| Surface Treatment Specification | : | Qq-p-416 ty 2 cl 3 fed spec single treatment response overall |
| Thread Series Designator | : | Unf |
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