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 6150-00-549-2427
NSN 6610-01-406-6696
NSN 5905-01-242-5632
NSN 5996-01-374-5820
NSN 6145-01-225-9931
NSN 5910-01-391-1268
NSN 6610-01-356-7471
NSN 6135-00-152-8729
NSN 5905-01-353-9124
NSN 5985-01-475-9050
NSN 5945-01-431-8124
NSN 6135-00-416-2898