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The MITUTOYO 611671-531 is a rectangular steel gage block manufactured to Grade 0 accuracy and conforming to ASME standards. Gage blocks are precision-ground, hardened steel reference standards used to calibrate measuring instruments, set comparators, and verify dimensional tolerances on the shop floor or in a metrology lab. This block measures 10 mm in nominal length and ships with a Certificate of Inspection confirming it meets stated accuracy requirements. Grade 0 represents a high level of dimensional accuracy, making this block suitable for calibration work and precision measurement applications where tighter tolerances are required.
This gage block is intended for use in machine shops, tool rooms, quality labs, and calibration facilities. It is used by machinists, metrologists, and quality control technicians to establish reference dimensions, qualify measuring tools such as micrometers and calipers, and verify part conformance. The 10 mm nominal size is a commonly referenced dimension in both inch and metric measurement workflows. Its rectangular form allows stacking with other gage blocks when wringing is required to build up a specific measurement stack.
Designed as an OEM-style precision reference standard compatible with standard rectangular gage block sets and accessories conforming to ASME gage block specifications.
Gage blocks are handled and stored by metrology technicians and quality control professionals. Keep contact surfaces clean and lightly oiled when not in use to prevent corrosion. When wringing blocks together, use clean, lint-free cloths and avoid sliding blocks laterally under load to protect lapped surfaces. Store in a temperature-controlled environment to minimize thermal expansion effects on dimensional accuracy.
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