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 6130-01-170-4059
NSN 7035-01-591-1236
NSN 7035-01-487-6481
NSN 6145-00-943-9549
NSN 6105-01-567-0810
NSN 6145-01-016-0755
NSN 5855-00-237-4088
NSN 5910-01-347-7118
NSN 6135-01-164-3561
NSN 5925-01-180-4468
NSN 6620-01-394-4042
NSN 5925-00-596-2146