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 5998-00-781-3769
NSN 5910-01-455-1965
NSN 5905-01-288-8632
NSN 6130-01-436-3611
NSN 5935-01-415-4100
NSN 5920-00-499-8285
NSN 7035-00-020-2227
NSN 6240-01-326-4139
NSN 5935-01-499-0165
NSN 6240-01-435-6505
NSN 5985-00-186-8755
NSN 6685-00-012-3734