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 6650-00-859-1859
NSN 5935-00-005-4800
NSN 6150-00-678-6124
NSN 7035-00-200-5162
NSN 6145-01-534-0390
NSN 5905-01-045-5288
NSN 5895-01-347-1016
NSN 5998-01-367-8879
NSN 6320-00-731-6134
NSN 5985-00-221-5566
NSN 5935-01-088-8669
NSN 5975-01-132-0223