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 5905-01-044-5606
NSN 6610-00-441-0523
NSN 6685-00-286-1132
NSN 5855-00-197-6387
NSN 5920-00-113-6041
NSN 5996-00-466-7857
NSN 7035-01-589-2629
NSN 6145-01-417-2988
NSN 5945-01-112-0148
NSN 6130-01-039-6571
NSN 6150-01-578-6419
NSN 6220-01-550-7173