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 6130-01-575-4734
NSN 5895-00-244-6750
NSN 6130-00-643-4894
NSN 5920-01-119-3652
NSN 5930-00-902-3486
NSN 6220-00-141-6150
NSN 5915-01-132-0634
NSN 6105-01-443-9028
NSN 6685-00-180-0349
NSN 6320-01-592-6248
NSN 5996-01-408-3511
NSN 5905-01-596-3936