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 6220-01-388-0823
NSN 5990-01-497-2138
NSN 5915-00-833-9025
NSN 5835-01-050-6993
NSN 6135-00-223-9563
NSN 4140-01-089-0465
NSN 5905-01-398-5511
NSN 6645-01-391-9820
NSN 5965-01-516-6130
NSN 5960-01-449-1310
NSN 6620-01-265-0632
NSN 5925-00-529-3950