Mitutoyo 611673-531 Gage Block 1.181 in 30 mm Grade 0 Steel

Precision Gage Block for Metrology

The Mitutoyo 611673-531 is a rectangular steel gage block with a nominal size of 30 mm (1.181 in). It meets ASME Grade 0 accuracy requirements for dimensional inspection and calibration tasks. Quality-control labs and toolroom technicians use it as a primary reference standard for verifying measuring instruments and setting comparative gages.

Stable Steel Construction for Repeatable

The hardened steel body resists wear and dimensional drift during routine handling in temperature-controlled environments. Rectangular faces measuring 35.00 mm by 23/64 in provide stable wringing surfaces without through holes. Tolerances are held to L: -0.3000 in to 0 in and W: -0.2000 in to -0.0500 in, supporting consistent contact geometry across repeated use.

Certificate of Inspection Included

Each block ships with a Certificate of Inspection confirming conformance to ASME Grade 0 specifications. No long-form calibration certificate is supplied, so users requiring full traceability documentation must arrange separate accredited calibration. The included certificate supports immediate acceptance into controlled gage libraries and satisfies basic audit requirements for traceable reference standards.