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Grade AS-2 .050 to 4.000" 81 PCS Rectangular Gage Block Set

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More Information
Mfg SKU #303-5308C
BrandShars Tool
Gage Block CategoryGage Block & Spacer Sets
Block Shaperetangular
Size Range - Gage Block0.050-4.0"
Certifying SpecificationASME B89.1.9-2002
Accuracy GradeAS-2
Tolerance18µ (0.05-0.4"), 24µ (0.45-1"), 32µ (2"), 40µ (3"), 48µ (4")
Number of Pieces81
NIST CertificateYes
Individually SerializedYes



  • Mirror Finish

    The measuring faces (2 sides) are ground and micro lapped to surface roughness of Ra 0.016 while the non measuring face (4 sides) are maintain at Ra 0.63. The mirror finished surface allow the gage block to be easily wringable.

  • Laser Marking

    Each gage block is laser marked with nominal length and serial number with reference to the calibration certificate.

  • ASME B89.1.9-2002 standard

    Inspection are taken place in a ISO-9001 certified laboratory and each block's measurement is recorded on the NIST traceable certificate, not a ISO17025 long form certificate.

  • Plastic Insert

    Each block is wrapped in a greasproof paper and placed inside the plastic insert holder to prevent corrosion and abrasion.

What’s Included

  • Calibration certificate traceable to the N.I.S.T.
  • 9 blocks: .1001-.1009" in .0001" steps
  • 49 Blocks: .101-.149" in .001" Steps
  • 19 Blocks: .050-.950" in .050 steps
  • 4 Blocks: 1-4" in 1" steps