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 6110-01-504-9421
NSN 5985-00-189-0953
NSN 6110-00-947-6621
NSN 6105-01-535-0999
NSN 5990-01-168-0820
NSN 5905-01-315-3351
NSN 6685-01-132-9681
NSN 6645-01-122-3803
NSN 5975-01-594-1669
NSN 5855-01-411-3360
NSN 5855-00-327-2061
NSN 6650-00-195-7519