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 5999-01-542-9923
NSN 4140-01-207-3577
NSN 5998-01-499-9686
NSN 5996-00-155-6904
NSN 5895-00-670-6079
NSN 6650-01-487-6274
NSN 5895-01-534-4261
NSN 6110-01-350-3449
NSN 5965-01-197-6924
NSN 6620-01-545-9837
NSN 6240-00-845-9098
NSN 6220-00-414-7528