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 6240-01-592-3176
NSN 5960-01-423-0803
NSN 6650-00-938-6785
NSN 5930-01-555-7889
NSN 5945-01-523-4582
NSN 6610-01-604-1744
NSN 5996-01-534-6088
NSN 6110-00-856-0048
NSN 2925-00-555-8836
NSN 5920-00-412-4813
NSN 5915-00-433-6985
NSN 5910-01-007-1562