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 6685-01-219-7863
NSN 6240-01-227-4178
NSN 5999-01-464-4301
NSN 6620-01-100-8899
NSN 4140-00-026-5437
NSN 5996-01-607-0991
NSN 6150-01-350-9943
NSN 6130-00-167-1138
NSN 5925-01-399-6777
NSN 6610-01-258-6206
NSN 4140-01-085-4965
NSN 5910-01-021-3446