Material is durium - silicon bronze
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.
Classification: Other copper screws (not for wood) bolts and nuts
NSN 6240-01-364-8696
NSN 6645-01-199-0062
NSN 5950-01-294-3158
NSN 5985-00-812-2402
NSN 5990-01-507-7495
NSN 5925-01-528-1139
NSN 5998-01-209-6715
NSN 5925-00-478-7352
NSN 6105-01-194-5999
NSN 5996-01-564-9511
NSN 5996-01-049-0851
NSN 6620-01-266-8894