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 5855-00-149-0766
NSN 6150-00-240-0873
NSN 5905-00-168-4589
NSN 6320-00-110-8005
NSN 6110-00-008-1766
NSN 6685-01-467-3035
NSN 5985-01-319-5158
NSN 5998-01-580-0564
NSN 5965-00-532-3284
NSN 5905-00-072-0678
NSN 5999-01-361-5314
NSN 6145-00-184-1110