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 5960-00-790-0509
NSN 5835-00-136-2322
NSN 6220-01-252-3458
NSN 7035-00-981-7216
NSN 5895-00-188-8156
NSN 5985-01-152-6754
NSN 5905-01-599-9067
NSN 6240-00-272-8601
NSN 5915-01-157-8407
NSN 5835-00-408-5499
NSN 5930-00-127-6495
NSN 6645-01-440-5500