Screw 4-40; ss; 1/2
No other part numbers with same form, fit, and function found.
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 6110-01-383-3914
NSN 5915-01-650-8515
NSN 5960-01-010-3083
NSN 6240-01-050-8306
NSN 6610-01-003-9763
NSN 6145-00-014-5759
NSN 6650-00-205-6282
NSN 6685-01-055-0823
NSN 5960-01-275-7552
NSN 5855-01-261-5495
NSN 6610-01-278-9387
NSN 5920-00-927-5568