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 5905-00-271-9130
NSN 5915-00-764-8686
NSN 4140-01-254-3689
NSN 5915-01-584-2404
NSN 5930-00-200-4426
NSN 6320-00-284-1524
NSN 6645-00-991-8704
NSN 4140-00-764-3839
NSN 5996-00-822-8182
NSN 5950-01-340-5625
NSN 5985-00-043-2664
NSN 5835-01-135-2601