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 6620-01-367-0844
NSN 5835-01-180-9441
NSN 4140-01-244-2449
NSN 2925-00-284-1534
NSN 6685-00-202-5233
NSN 5999-00-144-7698
NSN 5935-00-077-1686
NSN 6130-01-080-8766
NSN 5895-01-027-0746
NSN 5895-00-236-8877
NSN 5950-00-056-9908
NSN 4140-01-198-5652