1/4-20 x 1 3/4 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 5996-00-525-1777
NSN 6130-01-460-8885
NSN 6645-01-555-4356
NSN 6320-01-498-4954
NSN 6145-00-730-3933
NSN 5960-00-267-1635
NSN 6320-00-360-1301
NSN 6105-01-491-3006
NSN 2925-00-005-1618
NSN 5925-00-529-0441
NSN 6130-01-556-7433
NSN 6110-01-428-4263