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 6130-00-620-7872
NSN 6645-01-140-6700
NSN 5990-01-149-0691
NSN 6685-01-397-8694
NSN 5975-00-900-4013
NSN 5925-01-129-7623
NSN 5950-00-077-3137
NSN 4140-01-633-8555
NSN 6150-01-366-0733
NSN 6135-00-240-3200
NSN 5905-01-529-5669
NSN 4140-00-895-9624