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 5998-01-269-1781
NSN 2925-01-411-4666
NSN 6110-00-022-9565
NSN 5990-01-042-8524
NSN 5998-01-464-0745
NSN 7035-00-865-9105
NSN 6610-01-088-2352
NSN 5915-00-110-2669
NSN 4140-00-204-3563
NSN 5915-00-837-3164
NSN 6650-00-202-4540
NSN 6135-01-377-5729