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 6135-00-913-2062
NSN 5950-01-509-8670
NSN 7035-01-413-6697
NSN 2925-01-027-1293
NSN 5855-00-256-5562
NSN 5935-01-300-2283
NSN 5855-01-023-3727
NSN 6650-00-157-9403
NSN 5835-00-954-2833
NSN 6685-01-027-0354
NSN 5990-01-565-2226
NSN 5905-01-521-7216