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 6145-00-578-7522
NSN 5835-00-113-6090
NSN 5965-01-399-8454
NSN 5930-01-435-7680
NSN 5950-01-542-5493
NSN 6135-00-078-9931
NSN 6320-00-593-0379
NSN 5930-01-126-9728
NSN 5910-01-086-8557
NSN 6645-01-454-4139
NSN 5935-00-402-9124
NSN 7035-01-581-1063