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.)
Classification: Copper screws, nuts, bolts, rivets, and other fasteners not threaded
NSN 4140-01-654-5140
NSN 5999-01-589-6184
NSN 5920-01-622-4508
NSN 5965-01-051-0126
NSN 5855-01-656-6808
NSN 6130-01-548-0095
NSN 6610-01-599-4462
NSN 5930-01-440-5343
NSN 5965-01-328-7979
NSN 6110-01-357-6357
NSN 6685-00-458-8001
NSN 6320-00-194-4252