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 5960-01-089-8155
NSN 5855-00-145-3307
NSN 5998-01-009-9728
NSN 5895-01-178-8177
NSN 6620-00-674-3368
NSN 6645-01-352-5675
NSN 5965-00-757-3403
NSN 6610-01-412-0058
NSN 6110-01-303-2224
NSN 6610-00-247-5200
NSN 4140-01-584-4107
NSN 6610-00-191-5317