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 5950-01-366-5931
NSN 5985-01-642-1072
NSN 5855-01-068-3683
NSN 5910-00-005-4601
NSN 6145-00-343-5967
NSN 6320-01-393-7022
NSN 6645-01-426-8621
NSN 5945-01-027-3907
NSN 5950-01-599-6610
NSN 6685-01-029-3773
NSN 6220-01-181-7117
NSN 6650-01-492-5263