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 6320-00-299-3090
NSN 6220-01-233-7456
NSN 6145-00-125-0742
NSN 5855-01-495-1339
NSN 6130-01-616-8779
NSN 7035-01-301-3263
NSN 5965-00-977-5658
NSN 6135-00-078-9931
NSN 5975-01-359-1590
NSN 5925-01-051-5537
NSN 6145-00-590-8642
NSN 4140-00-143-9084