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 6135-01-549-3744
NSN 5935-01-027-4355
NSN 6145-01-216-6424
NSN 6145-01-028-2591
NSN 5930-00-814-8549
NSN 6620-00-882-6972
NSN 5910-01-407-1584
NSN 6645-00-678-9656
NSN 5925-00-844-6984
NSN 6135-01-462-1135
NSN 5965-01-253-0451
NSN 6145-01-238-8941