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 5945-01-170-5768
NSN 5895-00-964-8989
NSN 6620-00-062-9722
NSN 6610-00-575-7933
NSN 6135-01-415-1163
NSN 5996-01-633-7979
NSN 6150-00-205-2490
NSN 6685-00-003-6291
NSN 5895-00-358-1922
NSN 5985-01-423-1491
NSN 5960-01-552-8601
NSN 6220-01-616-5737