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 6620-00-236-7148
NSN 5985-01-287-1562
NSN 5950-01-008-7813
NSN 5990-00-107-0835
NSN 5935-00-712-2007
NSN 6145-00-052-5410
NSN 6130-01-141-5165
NSN 6145-01-392-0910
NSN 6685-01-493-7592
NSN 5855-01-208-1471
NSN 5950-00-780-5506
NSN 6105-01-351-5998