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 6130-01-573-8605
NSN 5990-01-116-2181
NSN 6610-00-575-7933
NSN 7035-01-364-0286
NSN 5930-01-110-5350
NSN 6620-01-642-7219
NSN 5985-01-328-3886
NSN 6685-01-441-2198
NSN 6130-01-364-1751
NSN 6135-01-604-8739
NSN 5998-00-378-4096
NSN 4140-01-077-7555