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 4140-01-634-0330
NSN 6320-00-557-3079
NSN 5910-00-446-6571
NSN 6610-00-575-7933
NSN 5960-01-273-7044
NSN 5996-01-652-6778
NSN 5935-00-700-1002
NSN 5999-00-852-1354
NSN 5915-01-458-9105
NSN 2925-01-221-9398
NSN 6130-01-099-5981
NSN 4140-01-238-7887