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 5930-01-411-1846
NSN 5905-00-170-8370
NSN 6110-01-298-8368
NSN 6650-00-519-0973
NSN 5985-00-999-0576
NSN 5950-00-099-9612
NSN 6130-00-677-4085
NSN 6135-00-862-5736
NSN 5925-00-917-7184
NSN 6220-01-216-8661
NSN 6320-01-207-9038
NSN 5935-01-237-1713