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 4140-00-244-2365
NSN 5935-00-914-3712
NSN 6610-00-437-5681
NSN 5985-01-383-7760
NSN 5965-00-135-0547
NSN 6685-01-301-3721
NSN 5895-01-253-1444
NSN 6610-01-593-0135
NSN 5910-00-266-8438
NSN 5895-01-605-5196
NSN 2925-00-613-2515
NSN 6220-01-534-8826