Size 5/16 x 1 and item has pan 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 6220-01-517-2365
NSN 6105-01-298-9285
NSN 5985-01-294-1163
NSN 5915-00-087-1477
NSN 6135-01-368-2785
NSN 5985-01-065-1675
NSN 5920-00-926-0621
NSN 4140-00-078-1017
NSN 5975-00-837-2260
NSN 6150-00-683-5349
NSN 6145-01-004-8343
NSN 6130-01-500-1088