Find Steel Balls at MSC Industrial Supply, serving the metalworking, safety, and MRO industries for over 75 years. Help. Sign In; Cart; Menu. Products. All Product Categories ... 3/16 Inch Diameter, Grade 1,000, Carbon Steel Ball. 60 to 67 C M.N. Hardness, 0.005 Inch Diameter Deviation, 0.001000 Inch Sphericity. Web Price. $1.91 / ea. MSC ...