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 5910-01-498-3507
NSN 5910-01-540-5920
NSN 5835-01-310-8979
NSN 5855-01-284-0200
NSN 2925-00-964-7128
NSN 5965-00-888-2643
NSN 6685-01-245-0272
NSN 6620-01-384-9708
NSN 5999-01-270-0381
NSN 6110-01-567-6596
NSN 5835-00-540-9669
NSN 6105-01-515-6351