These are 3mm Flanged Lock Nuts by HPI Racing. FEATURES: Black aluminum construction. Blue nylon insert. Can be used for wheels, slipper clutch springs, and other applications which require easy removal and will not loosen due to vibrations. YOU WILL RECEIVE: (6) Lock Nuts SPECIFICATIONS: Diameter: 3mm dew 02/02/02 ir/kh kr4/25/03 &