Mitutoyo 614212-531 Square Steel Gage Block 0.25 in Grade 0

Product Description

The MITUTOYO 614212-531 is a square steel gage block measuring 0.25 inches, manufactured to Grade 0 accuracy. Gage blocks are precision-ground reference standards used to calibrate measuring instruments, set comparators, and verify dimensional tolerances in machine shops, metrology labs, and manufacturing environments. This block conforms to ASME standards and ships with a Certificate of Inspection, confirming dimensional accuracy at the Grade 0 tolerance level. Grade 0 blocks are among the tightest commercially available accuracy grades, making this block appropriate for calibration work and high-precision inspection tasks. Installation and use require a stable, temperature-controlled environment to maintain measurement integrity.

This gage block is intended for metrology professionals, quality control technicians, and precision machinists who need a reliable dimensional reference at 0.25 inches. It is suited for use in inspection departments, tool rooms, and calibration labs. The block can be used individually or wrung with other blocks in a matched set to achieve composite dimensions. Its square form factor provides stable seating on surface plates and in fixtures during setup and inspection work.

Key Features

• Grade 0 accuracy per ASME standards for high-precision calibration and inspection use
• 0.25-inch nominal size with five-decimal precision per ASME specification
• Steel construction provides durability and wear resistance for repeated use
• Includes Certificate of Inspection documenting dimensional conformance
• Square block form factor allows stable placement and easy wringing with other blocks

Compatibility

Designed as an ASME-compliant Grade 0 reference standard suitable for use with standard gage block accessories, holders, and comparator setups common in precision metrology applications.

Installation Notes

Gage blocks are handled and used by metrology technicians and quality control personnel, not installed in the traditional sense. Before use, clean block surfaces with an appropriate solvent and lint-free cloth to remove oils and debris that could affect accuracy. Store blocks in their protective case when not in use and avoid exposing them to temperature extremes, as thermal expansion will affect dimensional readings. Never slide gage blocks across abrasive surfaces, and inspect for burrs or nicks before wringing.