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 5950-00-802-8038
NSN 5925-01-263-0317
NSN 5935-01-569-1342
NSN 6145-00-622-4634
NSN 4140-01-067-8986
NSN 5935-01-144-0635
NSN 5925-01-426-6923
NSN 6685-01-370-4238
NSN 6645-01-415-6093
NSN 6650-01-102-7847
NSN 6650-00-139-5462
NSN 5855-00-256-5562