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 6145-01-502-0005
NSN 5895-01-399-1890
NSN 6130-01-655-3201
NSN 6645-01-644-8376
NSN 6130-01-464-2667
NSN 5930-01-204-3843
NSN 6610-01-516-7278
NSN 5925-00-369-7747
NSN 5960-01-333-8428
NSN 5915-01-081-7102
NSN 6645-00-479-9334
NSN 5998-01-558-1805