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 5835-00-891-2232
NSN 5999-00-099-6889
NSN 5855-01-591-7998
NSN 6220-01-499-6157
NSN 6240-00-445-4765
NSN 5945-01-528-4423
NSN 6620-00-218-4959
NSN 5999-00-862-1925
NSN 5945-00-269-5375
NSN 6220-01-502-9451
NSN 2925-00-408-9829
NSN 6145-01-452-8545