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 6320-00-788-5297
NSN 5920-01-152-1949
NSN 6135-00-985-7887
NSN 5910-00-339-2198
NSN 5935-01-483-1976
NSN 5999-01-445-6320
NSN 6105-01-645-4935
NSN 6130-00-244-1406
NSN 6145-00-563-1103
NSN 5855-01-271-6617
NSN 6610-01-651-8659
NSN 5910-00-715-7966