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 5945-01-519-7422
NSN 5975-00-436-4997
NSN 6610-01-453-4269
NSN 6320-01-442-8604
NSN 5925-01-600-0447
NSN 6145-01-348-0938
NSN 5855-01-461-0690
NSN 5930-01-379-5476
NSN 6110-01-087-9071
NSN 6130-00-218-1363
NSN 5915-00-916-8017
NSN 5998-00-557-2832