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 6320-01-211-6578
NSN 6150-00-279-9337
NSN 5935-00-383-3535
NSN 5855-01-067-7807
NSN 6645-01-093-5015
NSN 6685-00-799-5783
NSN 6685-01-607-6481
NSN 6240-01-364-0815
NSN 5835-00-491-6075
NSN 6145-00-610-6987
NSN 2925-01-078-7854
NSN 5905-01-142-3362