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 5910-01-015-8167
NSN 2925-01-381-5307
NSN 5935-01-625-8598
NSN 5895-00-921-8261
NSN 6135-01-466-3980
NSN 5950-01-179-7929
NSN 6105-00-578-8114
NSN 5999-01-471-1118
NSN 6650-01-554-2824
NSN 5905-01-462-0575
NSN 5910-00-238-5657
NSN 5985-01-220-4982