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STM 1-2-3 Blocks, 23 Holes – 230-870

$23.96 $29.95

STM 1-2-3 Blocks, 23 Holes - 230-870 1" x 2" x 3" Heat treated and case hardened to HRC 55-60 . Precision ground and case hardened. Surface finish 616 micro inches. 23 holes5 are tapped in 3/8-16. Squareness: .0001" Parallelism: .0003"

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STM 1-2-3 Blocks, 23 Holes – 230-870

  • 1″ x 2″ x 3″
  • Heat treated and case hardened to HRC 55-60 .
  • Precision ground and case hardened.
  • Surface finish 616 micro inches.
  • 23 holes5 are tapped in 3/8-16.
  • Squareness: .0001″
  • Parallelism: .0003″

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