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 5855-01-212-6612
NSN 6610-00-935-7131
NSN 6135-00-223-9563
NSN 4140-01-306-0609
NSN 5920-01-129-7455
NSN 6620-01-132-1776
NSN 5998-01-062-2149
NSN 6150-01-012-2185
NSN 6685-01-509-9495
NSN 5990-01-658-9964
NSN 7035-01-602-9350
NSN 4140-01-387-0331