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 6645-00-163-9580
NSN 5990-01-492-1114
NSN 7035-00-631-3782
NSN 5965-00-113-9748
NSN 6145-01-323-8813
NSN 6610-01-391-6781
NSN 5985-01-065-3734
NSN 5895-00-772-5947
NSN 5925-01-188-0051
NSN 5985-00-375-1837
NSN 5960-00-688-7510
NSN 5920-01-527-0961