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 6620-01-623-7266
NSN 5960-00-594-0824
NSN 5855-00-688-9954
NSN 5855-01-273-6132
NSN 6135-01-540-2403
NSN 5960-01-067-9531
NSN 5996-01-177-2150
NSN 6685-01-575-1867
NSN 2925-01-161-7440
NSN 6610-00-149-1534
NSN 6130-00-263-1827
NSN 5999-01-510-8567