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 6220-00-058-5002
NSN 5990-00-845-2864
NSN 6645-00-816-1707
NSN 6105-01-233-4466
NSN 6135-01-416-3181
NSN 5998-01-458-5376
NSN 5996-01-146-2588
NSN 5975-00-258-3056
NSN 6685-00-765-8283
NSN 5935-01-444-1504
NSN 6130-01-032-4958
NSN 5985-01-122-4985