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 6150-00-431-8934
NSN 5945-01-428-2713
NSN 5930-01-498-6871
NSN 6145-01-319-4884
NSN 6645-01-446-1994
NSN 6110-01-382-4643
NSN 6620-00-058-5225
NSN 6320-01-021-6633
NSN 5855-01-354-7291
NSN 5965-01-495-1170
NSN 5920-01-388-7293
NSN 5925-01-117-8170