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 4140-01-163-6010
NSN 5985-01-495-3531
NSN 6110-00-394-7187
NSN 6610-01-440-4314
NSN 5960-01-614-8005
NSN 6610-01-168-7943
NSN 6320-01-201-2776
NSN 6105-01-125-6498
NSN 5835-01-414-3258
NSN 6145-01-212-7990
NSN 5975-01-407-2829
NSN 5990-01-081-3845