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 5945-00-971-4282
NSN 6135-01-312-1040
NSN 6685-01-586-7005
NSN 6130-00-468-6222
NSN 5945-01-322-7960
NSN 5990-00-716-3756
NSN 6320-01-267-5117
NSN 6145-01-100-4921
NSN 5910-01-431-7059
NSN 6645-01-471-4960
NSN 6150-01-170-1109
NSN 6685-00-420-2781