Product Features

• Serialized with a certificate detailing the environmental conditions used to test the block• Actual readings are given, with the averages of minimum reading, maximum reading and a repeatability figure• Hardness test blocks are designed to be used on one side only• Indents should be more than 0.01 in from the centers of two indents or no closer to the block's edge than 0.04 in• Compatible with 3814, 3816 and 3817 testers• They are available in steel, brass and aluminum