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 5935-01-452-5502
NSN 5930-00-300-3864
NSN 6145-01-415-3978
NSN 6145-01-566-0865
NSN 5996-01-363-9606
NSN 6105-01-359-9146
NSN 6320-01-181-9474
NSN 5945-00-619-3553
NSN 6645-01-531-3142
NSN 5975-01-634-0678
NSN 6620-01-326-0715
NSN 5996-01-487-4377