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 6130-00-081-2186
NSN 5930-00-402-1628
NSN 5998-01-026-3768
NSN 6650-00-677-2577
NSN 6320-00-270-8222
NSN 5920-01-475-4897
NSN 5855-01-364-1005
NSN 5925-01-021-4236
NSN 5975-01-493-2074
NSN 5945-01-163-7684
NSN 2925-00-201-8247
NSN 6685-00-260-5628