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 6130-01-581-0259
NSN 5950-01-373-7014
NSN 5985-01-474-8696
NSN 5996-01-366-8852
NSN 6220-01-140-3516
NSN 5990-01-522-6096
NSN 5985-01-461-8575
NSN 5960-00-473-2602
NSN 5960-00-789-4474
NSN 5998-01-565-8604
NSN 6650-01-652-8447
NSN 2925-01-305-1370