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 6220-00-703-5200
NSN 5975-00-660-6652
NSN 5960-01-127-5425
NSN 7035-01-044-0136
NSN 6650-01-271-7351
NSN 6150-01-268-0541
NSN 5975-01-352-5853
NSN 6220-01-207-7229
NSN 6135-00-962-4111
NSN 6135-00-405-1989
NSN 5945-00-593-1736
NSN 6685-01-342-8985