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 6110-00-959-7002
NSN 6105-00-865-2746
NSN 5985-01-514-4482
NSN 5920-01-490-6863
NSN 6650-00-945-9105
NSN 5905-01-195-7200
NSN 6650-01-052-0015
NSN 2925-01-103-4499
NSN 6220-01-512-9576
NSN 6685-00-486-5150
NSN 5975-00-804-7875
NSN 6145-01-571-0921