Mitutoyo 611194-541 Steel Gage Block 0.4 in Grade AS-1

Product Description

The MITUTOYO 611194-541 is a rectangular steel gage block measuring 0.4 inches in overall length, manufactured to ASME Grade AS-1 accuracy standards. Gage blocks are precision-ground reference standards used to calibrate measuring instruments, set up comparators, and verify dimensional tolerances in machining and inspection environments. This block ships with a Certificate of Inspection, confirming it meets the stated accuracy grade at time of manufacture. At 1 pound, it is a solid, single-block unit suited for bench use in quality control labs, tool rooms, and production floor inspection stations.

This gage block is intended for use in metrology and dimensional inspection applications where a traceable 0.4-inch reference standard is required. It is appropriate for calibrating micrometers, dial indicators, height gauges, and similar precision measuring instruments. Typical users include quality technicians, tool and die makers, machinists, and calibration lab personnel working in both light manufacturing and precision machining environments. The included Certificate of Inspection supports documentation requirements in ISO-compliant and regulated shop environments.

Key Features

• Grade AS-1 accuracy per ASME standards for reliable dimensional reference
• 0.40000-inch nominal size with five-decimal precision designation
• Steel construction for durability and resistance to wear in regular shop use
• Includes Certificate of Inspection for traceability documentation
• Rectangular form for stable, flat-surface contact during measurement setups

Compatibility

Designed as an OEM-style individual gage block for use with standard gage block sets, holders, and accessories compatible with rectangular-form steel gage blocks meeting ASME dimensional standards.

Installation Notes

Gage blocks are handled and stored by metrology technicians and quality control personnel, not typically installed by a trade contractor. Keep contact surfaces clean and free of burrs before wringing or placing the block in a comparator setup. Store in the supplied case or a clean, low-humidity environment to prevent corrosion on steel surfaces. Never drop or strike the lapped faces, as surface damage will affect accuracy and void the certificate.