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Flexbar 20529 | A Scale Rockwell Hardness Test Block | HRA 73
Part Number : 20529
Rated HRA 73, the Flexbar 20529 is a 2 1/2 in round reference block for checking Rockwell A scale hardness testers. The steel is heat and cold treated to give consistent, repeatable readings.
Key features
- Value: HRA 73
- Round block, 2 1/2 in diameter
- Flexbar states accuracy exceeds ASTM E10, E92 and E384
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