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 5998-01-423-0093
NSN 4140-00-443-1210
NSN 5905-01-245-9348
NSN 6220-00-012-0027
NSN 6685-01-067-3743
NSN 6650-01-582-6212
NSN 5920-01-497-9528
NSN 5945-00-482-9624
NSN 6685-01-076-4703
NSN 5985-01-110-8134
NSN 5985-01-382-9220
NSN 6135-00-170-8819