Mitutoyo 611189-531 Steel Gage Block 0.149 in Grade 0

Product Description

The MITUTOYO 611189-531 is a rectangular steel gage block measuring 0.149 inches, manufactured to Grade 0 accuracy standards per ASME specifications. Gage blocks are precision-ground reference standards used to calibrate measuring instruments, set comparators, and verify dimensional accuracy in machining and inspection environments. This block ships with a Certificate of Inspection, confirming it meets the stated tolerance grade at the point of manufacture. Grade 0 represents a high level of dimensional accuracy, making this block appropriate for quality control labs, tool rooms, and metrology applications where traceable measurement standards are required.

This gage block is suited for use in machine shops, metrology labs, and manufacturing inspection stations. It serves as a reference standard for calibrating micrometers, dial indicators, height gauges, and similar instruments. Grade 0 blocks are typically used in controlled environments where temperature and surface cleanliness are maintained to preserve measurement integrity. Machinists, quality control technicians, and calibration specialists are the primary users of this type of block.

Key Features

• Grade 0 accuracy per ASME standards — suitable for inspection and calibration reference use
• Steel construction for durability and dimensional stability
• Nominal size of 0.149 inches with five-decimal inch precision designation
• Includes Certificate of Inspection for traceability documentation
• Rectangular block form for stable surface contact and wringing compatibility

Compatibility

Designed as an OEM-style precision reference standard for use with standard gage block sets and compatible with measuring instruments requiring a 0.149-inch reference dimension in inch-based metrology systems.

Installation Notes

Gage blocks are handled and stored by calibration technicians and quality control professionals following established metrology practices. Blocks should be kept clean and free of burrs or corrosion to maintain accuracy. Wring blocks together only on clean, flat surfaces using light pressure and a sliding motion. Store in the provided case when not in use and allow blocks to reach ambient temperature before use in precision measurement.