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 5920-01-187-8391
NSN 6145-00-857-6903
NSN 2925-00-005-1618
NSN 6320-00-701-0437
NSN 6320-00-310-1080
NSN 2925-01-157-9204
NSN 5835-00-269-2232
NSN 6620-01-168-8450
NSN 6685-01-432-2266
NSN 2925-01-599-1901
NSN 6650-00-824-5510
NSN 6620-01-029-3705