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 6650-01-644-0582
NSN 5975-01-322-8515
NSN 6610-01-087-7718
NSN 5998-01-020-2651
NSN 5960-01-279-2589
NSN 5835-01-369-7837
NSN 5925-01-087-4854
NSN 5965-00-263-6436
NSN 6220-01-102-9027
NSN 5910-01-398-3553
NSN 6105-01-609-0477
NSN 5935-01-330-1781