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 5905-01-515-3973
NSN 6650-00-590-9073
NSN 5990-01-287-9447
NSN 5960-00-597-2680
NSN 5935-01-525-4501
NSN 5905-01-200-6246
NSN 6620-01-034-7636
NSN 5895-01-322-4836
NSN 6685-01-529-6504
NSN 7035-00-529-3128
NSN 4140-00-679-9512
NSN 6150-01-433-4848