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 6240-01-462-4812
NSN 5925-01-604-0125
NSN 5996-00-821-8136
NSN 5965-00-892-3665
NSN 5945-00-293-8333
NSN 6620-01-421-3917
NSN 5950-01-614-9285
NSN 7035-01-535-6945
NSN 5930-01-483-3496
NSN 5960-01-082-8571
NSN 6240-01-073-4487
NSN 5990-01-633-9503