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 5925-00-529-0441
NSN 5905-01-535-2814
NSN 5835-00-073-0790
NSN 6145-01-381-1387
NSN 6220-01-056-5169
NSN 5895-00-537-4231
NSN 6645-01-177-2766
NSN 5935-01-418-7519
NSN 6150-00-076-8808
NSN 5985-00-239-4793
NSN 5935-00-186-8729
NSN 5965-00-199-4456