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 5945-01-453-0603
NSN 6240-01-411-5425
NSN 5910-01-553-4137
NSN 5925-01-462-4829
NSN 5945-01-127-7623
NSN 6130-01-149-2604
NSN 5905-00-111-3618
NSN 5998-00-343-0732
NSN 6320-01-087-7961
NSN 6220-01-371-5438
NSN 6105-01-634-0322
NSN 6610-01-625-6855