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 6220-00-583-3442
NSN 6685-00-363-1701
NSN 5975-00-142-2450
NSN 6620-01-486-8002
NSN 6110-00-422-4973
NSN 5996-00-450-9875
NSN 2925-01-033-0141
NSN 6135-00-575-8942
NSN 6610-01-444-4001
NSN 6650-00-834-9062
NSN 5999-01-119-2983
NSN 5915-00-496-3282