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 6610-00-971-4881
NSN 5895-01-415-8663
NSN 6320-00-468-8421
NSN 6110-01-116-2353
NSN 5910-00-926-0111
NSN 6105-01-367-5643
NSN 6105-00-063-7633
NSN 6620-01-089-4416
NSN 5950-01-090-0277
NSN 6685-01-004-9356
NSN 5835-01-464-7038
NSN 2925-01-113-6904