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4.0" Steel Gage Block Grade 0 w/ NIST Cert
| - Manufactured in a controlled environment to ensure maximum accuracy. - Constructed of a special alloy steel with high carbon and chrome content and hardened to 65 Rc - Meets or exceeds the latest Federal Spec ASME B891.9-2002 - Each Block supplied with either ISO Certificate of Calibration or a Certificate of calibration traceable to N.I.S.T. - Surface Finish: .4 millionths (.01 microns) assures excellent wringing and stackability |
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