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 6135-00-471-5356
NSN 6645-00-909-2143
NSN 6240-01-621-7646
NSN 5998-01-597-7145
NSN 5965-00-104-3121
NSN 5925-01-206-4330
NSN 6105-01-056-0959
NSN 6135-00-170-8819
NSN 5985-00-861-1757
NSN 5920-00-422-0757
NSN 5895-01-632-1719
NSN 5999-00-624-4312