1/4-20 x 2 inches
An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. See also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.
NSN 5855-01-436-2862
NSN 5985-01-493-6875
NSN 4140-01-262-7226
NSN 7035-01-191-2822
NSN 5999-01-553-4107
NSN 6610-00-974-5348
NSN 6130-01-047-0213
NSN 6150-01-502-8295
NSN 6105-01-463-8557
NSN 5920-00-564-5702
NSN 5905-00-681-9927
NSN 5945-01-290-5773