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 5996-01-415-3901
NSN 5965-01-369-8016
NSN 7035-00-549-2722
NSN 6240-00-567-4795
NSN 5945-01-126-7281
NSN 6320-01-132-2746
NSN 4140-00-816-8820
NSN 5925-01-170-4150
NSN 6220-01-003-9126
NSN 5855-00-862-3345
NSN 5999-01-099-0098
NSN 5975-00-202-5013