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 5996-00-915-3164
NSN 5985-00-990-9579
NSN 5855-01-513-9601
NSN 6685-01-335-0397
NSN 5935-01-473-0460
NSN 5965-01-472-3664
NSN 5920-01-021-5198
NSN 2925-01-430-4206
NSN 5835-00-489-4513
NSN 5905-00-269-5452
NSN 4140-00-825-7506
NSN 6135-01-159-3032