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 6685-00-468-4223
NSN 5960-00-273-3260
NSN 5930-00-050-3248
NSN 5990-01-378-7349
NSN 7035-01-327-4456
NSN 6620-01-514-7786
NSN 5965-00-139-1039
NSN 5960-01-075-7732
NSN 5999-01-176-6109
NSN 4140-00-217-2619
NSN 5925-00-247-1361
NSN 5985-00-666-2987