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 5985-01-561-1939
NSN 5945-01-059-4272
NSN 5925-01-137-3752
NSN 2925-01-408-6205
NSN 5935-01-424-5773
NSN 5905-00-651-1684
NSN 6645-00-557-5989
NSN 4140-00-980-7251
NSN 7035-01-364-8454
NSN 5935-01-444-2385
NSN 6645-01-445-9089
NSN 5965-01-240-0233