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 5910-00-192-4514
NSN 6110-00-325-4519
NSN 6105-01-101-1262
NSN 6135-01-312-1040
NSN 6685-01-313-0438
NSN 6610-00-186-9180
NSN 6135-01-561-5945
NSN 5965-01-222-1420
NSN 5945-00-369-0422
NSN 5895-00-781-3625
NSN 5945-01-061-9441
NSN 6620-01-123-6663