Special Features:

Item is a torlon countersunk flat head machine screw; material: general-purpose polyamide-imide (torlon) grade 4203 = extruded rod, and 4203l = injection molded; workmanship - screws shall show no evidence of cross threading or multilation; thread length - full form threads shall extend to within two threads of the bearing surface of the head or closer if practicable; marking shall be in accordance with mil-std-130; quality assurance provisions

Properties:

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.