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 5996-01-014-6103
NSN 6150-00-027-1235
NSN 5975-01-378-0717
NSN 6150-01-272-9792
NSN 6220-01-533-1302
NSN 6685-00-171-9815
NSN 5920-00-726-8084
NSN 6645-01-296-9769
NSN 4140-01-626-3827
NSN 6105-00-153-7967
NSN 5945-01-262-0616
NSN 5990-01-009-1422