Ultra Precision 1-2-3 Block Set, 23 holes, 1 Pair Set, Premium Package

Squareness: 0.0003"/1" (#EG28-0421)

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Ultra Precision 1-2-3 Block Set, 23 holes, 1 Pair Set

  • Heat treated and case hardened to HRC 58-62 on 6 sides.
  • With 23 holes, consists of 5 tapped holes that are 3/8"-16 for clamping and 18 untapped holes.
  • Cross drilling design gives minimum weight and maximum strength.
  • Each set contains two matched blocks in pairs.
  • Packed in a fitted strong case.
  • Parallelism: 0.0002"
  • Size range: ±0.0002"
Item# Squareness 
EG28-0420 0.0001"/1"
EG28-0421 0.0003"/1"


Accusize Catalog CANCNC 1-2-3 Block Sets with 23 holes, squareness 0.0003"/1" (8407-0005)


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