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 6130-01-556-1958
NSN 5935-01-531-9975
NSN 6645-01-076-4655
NSN 6685-01-480-6593
NSN 6610-00-859-6136
NSN 5950-01-016-1197
NSN 4140-01-026-9293
NSN 5990-00-146-3534
NSN 5998-01-381-0403
NSN 5925-00-171-0307
NSN 5998-01-617-4103
NSN 5985-01-499-8178