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 4140-00-476-8683
NSN 6620-01-155-6564
NSN 6110-01-385-9337
NSN 5950-01-526-5590
NSN 6320-01-585-8468
NSN 6685-01-456-3717
NSN 5965-00-246-5612
NSN 7035-01-432-2424
NSN 6145-01-649-0650
NSN 6110-01-502-9212
NSN 5935-00-177-3505
NSN 5905-00-456-0937