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 6620-00-121-4632
NSN 5985-00-082-3989
NSN 5999-00-026-7854
NSN 5905-00-247-1473
NSN 5985-01-025-9711
NSN 5965-00-594-3115
NSN 6145-01-302-4124
NSN 2925-00-099-4030
NSN 6645-01-364-7330
NSN 6145-01-551-1419
NSN 5999-00-515-7354
NSN 5930-01-316-3995