SPI Standard Test Block

Features:

• Standard test blocks provides an easy means of checking your tester's accuracy
• Periodic testing on a regular basis is recommended
• Comparing a test reading of the block with the hardness number on the test block will indicate wheather or not the instrument needs attention
• A surfece rating of less than 5 micro-inches (CLA), and both test and supporing surfaces flat and parallel prior to being calibrated
• Order the hardness range and scale which is approximately the same as the work you will be testing.
• Approximate sizes: 1-1/2"L x 2-1/2"W x 1/2"H