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 6610-01-439-8513
NSN 5915-01-600-5246
NSN 7035-01-391-7470
NSN 6105-00-675-5920
NSN 5920-01-100-3018
NSN 6650-00-751-9958
NSN 6620-00-115-9050
NSN 5999-01-254-8514
NSN 5985-01-037-5808
NSN 5965-00-590-7995
NSN 6620-01-446-6571
NSN 5999-01-007-2415