Mitutoyo 611189-541 Steel Gage Block 0.149 in Grade AS-1

Product Description

The MITUTOYO 611189-541 is a rectangular steel gage block measuring 0.149 inches, manufactured to ASME Grade AS-1 accuracy. Gage blocks are precision length reference standards used to calibrate measuring instruments, verify part dimensions, and establish traceable measurement baselines in machine shops, metrology labs, and quality control environments. This block ships with a Certificate of Inspection, providing documented traceability for audit and compliance purposes. Grade AS-1 represents a high level of dimensional accuracy suitable for inspection-grade measurement work. The steel construction offers durability and wear resistance through repeated use in production and lab settings.

This gage block is used wherever a precise 0.149-inch reference dimension is required. Typical applications include setting dial indicators, micrometers, and comparators, as well as stack-up calibration setups. It is suited for use in precision manufacturing, tool and die, aerospace, and general metrology applications. Machinists, quality technicians, and metrologists are the primary users. The included Certificate of Inspection supports use in environments requiring documented measurement traceability under ASME standards.

Key Features

• Grade AS-1 accuracy per ASME standards for inspection-grade measurement reference
• 0.149-inch nominal size with five-decimal precision
• Steel construction for durability and resistance to wear during repeated handling
• Includes Certificate of Inspection for documented traceability
• Rectangular form for stable stacking and wringing with other gage blocks

Compatibility

Designed as an OEM-style precision reference standard for use with standard gage block sets and accessories compatible with rectangular-form steel gage blocks meeting ASME dimensional specifications.

Installation Notes

Gage blocks are handled and set up by machinists, quality technicians, and metrologists. Clean all mating surfaces before wringing blocks together to prevent contamination and measurement error. Store blocks in their case when not in use to protect lapped surfaces. Never drop or strike a gage block against hard surfaces, as this can alter the precision geometry of the reference faces.