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 6620-01-352-1854
NSN 5855-01-510-8235
NSN 6145-00-233-7473
NSN 5905-01-428-4457
NSN 5960-01-276-2828
NSN 6650-01-465-5362
NSN 6320-01-600-5808
NSN 5960-01-411-5899
NSN 5925-01-645-9136
NSN 5996-00-487-0755
NSN 6620-00-010-0319
NSN 5960-01-303-5884