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This parallel block is a pair of precision online and quality online a 2x3x4 inches precision at three parts per million precision and has 23 holes, made of high quality steel, wear-resistant and durable.
Easy to use, even for the novice whites.
Package includes: a pair of 23 holes 2x3x4 inches parallel blocks with three ten thousandths precision.
Squareness: 0.0003"/1"
Parallelism: ±0.0003"
Dimensional accuracy: ±0.0005"
Height accuracy in pair: ±0.0003"
Hardness: HRC 56-62
Surface smoothness 6-16 micro inches
5 holes tapped to 3/8-16unc
others are untapped
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