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 6135-01-199-1185
NSN 2925-01-583-5619
NSN 5855-01-138-3396
NSN 6220-01-603-0662
NSN 7035-01-403-2841
NSN 6135-01-563-4445
NSN 5965-01-512-8842
NSN 5895-00-263-2719
NSN 6130-01-272-9765
NSN 5905-00-533-6272
NSN 5905-00-690-1935
NSN 6620-01-344-4005