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 5960-01-512-0233
NSN 5935-01-220-5141
NSN 7035-01-566-3784
NSN 5925-00-930-2265
NSN 6240-00-760-3713
NSN 4140-00-991-8849
NSN 5920-01-367-5371
NSN 6620-00-889-7945
NSN 5925-01-421-5731
NSN 6240-01-155-2959
NSN 5985-01-315-6566
NSN 6610-01-171-1058