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 5910-01-142-7760
NSN 5915-01-467-1630
NSN 6135-00-164-8780
NSN 6320-01-544-0860
NSN 6620-01-168-2557
NSN 5895-01-364-8459
NSN 5975-01-334-5439
NSN 5950-01-449-0943
NSN 6610-01-416-2738
NSN 5910-01-288-5644
NSN 5999-01-559-9315
NSN 5905-00-304-0406