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 7035-01-524-7018
NSN 5996-01-314-9048
NSN 6610-01-347-6781
NSN 6320-00-593-0379
NSN 6110-00-988-6875
NSN 6685-01-653-7755
NSN 5985-00-233-6740
NSN 6620-00-706-2481
NSN 5910-01-485-3636
NSN 5835-01-512-4834
NSN 6650-01-207-2905
NSN 6685-00-569-1764