Stainless Steel Ball 440C, Stainless Steel, 440C, Round, Ball Bearing Grade 25, Outside Diameter 1/2 in, Outside Diameter Tolerance +/-0.0001 in, Fabrication Cold Finished, Heat Treatment Through Hardened, Heat Treatable Yes, Mechanical Finish Polished, Not Applicable Brinell Hardness, C58 to C65 Rockwell Hardness, Includes Material Certificate Yes, Standards ANSI/ABMA, Minimum Temperature -300 Degrees F, Maximum Temperature 1,200 Degrees F, Appearance Mirror-Like
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