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 6220-01-492-5018
NSN 5935-00-389-7160
NSN 5895-01-437-1247
NSN 6685-01-602-9962
NSN 5960-01-512-0233
NSN 5905-00-929-2130
NSN 6685-01-514-8655
NSN 6620-01-414-4578
NSN 6320-00-456-0836
NSN 5999-00-099-6889
NSN 5999-00-731-9823
NSN 5965-00-153-5216