Watertight 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 5905-01-629-8904
NSN 7035-00-916-9380
NSN 5925-01-446-3353
NSN 5990-01-060-3687
NSN 5950-01-089-6121
NSN 6645-00-215-0102
NSN 6130-01-418-1606
NSN 5985-00-918-3843
NSN 5930-01-539-3707
NSN 5985-01-546-5484
NSN 5998-01-214-0986
NSN 5990-00-391-6207