A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 5985-01-100-7195
NSN 5999-00-193-2816
NSN 5925-00-660-5403
NSN 6145-01-476-7554
NSN 5945-01-451-3910
NSN 5925-01-462-2209
NSN 2925-01-038-7625
NSN 6610-01-532-4217
NSN 5990-01-328-0808
NSN 6240-01-388-4099
NSN 5895-01-031-3036
NSN 6645-01-588-5591