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 6320-00-857-4073
NSN 5925-01-047-8884
NSN 6145-01-359-4691
NSN 5999-01-212-2788
NSN 6645-01-400-2119
NSN 6150-01-443-5243
NSN 5999-01-108-3137
NSN 5920-01-381-2597
NSN 5999-00-455-8867
NSN 5985-00-275-9113
NSN 6645-00-147-9069
NSN 7035-01-024-9511