Standard Diameter: 7/16 /. Metric Diameter: 11.1125mm. Material: AISI 1010 Carbon Steel. 200 Ounces / 5.6726 Grams. Carbon steel balls are used in automotive applications, for semi-precision bearings, and in commercial applications such as casters, locks, and drawer slides. Other applications for carbon steel balls include locks, bicycles, roller skates, slides, trolleys and conveyors.