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 5855-01-344-3706
NSN 5990-01-298-6616
NSN 5960-01-641-5493
NSN 6685-00-369-2677
NSN 5930-01-023-1571
NSN 5925-01-547-4304
NSN 6610-00-428-3678
NSN 5960-01-354-0762
NSN 6150-01-120-9524
NSN 5975-00-812-9155
NSN 6130-00-227-7798
NSN 5965-01-460-2766