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 6150-01-330-2000
NSN 6650-01-502-6761
NSN 6105-01-465-3463
NSN 6645-01-526-8782
NSN 6320-01-341-9126
NSN 6320-01-476-5145
NSN 4140-01-468-4689
NSN 6240-00-950-3859
NSN 6650-01-277-8273
NSN 6320-01-451-0821
NSN 5915-01-524-0639
NSN 6130-01-371-4571