Size 3/16 x 1/2 and item has oval head
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 5996-01-084-2054
NSN 4140-00-567-9291
NSN 5999-01-474-5011
NSN 4140-01-533-2606
NSN 5835-01-469-6009
NSN 5895-01-512-2938
NSN 6685-01-654-3677
NSN 6650-01-139-9534
NSN 5985-00-516-1316
NSN 6610-01-470-3413
NSN 5945-01-446-9157
NSN 6220-01-449-2807