Mitutoyo 177-291 Ring Gage 1.6 Inch Diameter Master Setting Standard

The Mitutoyo 177-291 is a precision ring gage with a 1.6-inch diameter, designed as a master setting standard for dimensional measurement tools. This reference gage provides a highly accurate known dimension for calibrating and setting bore measurement instruments.

Key Features:

• 1.6-inch nominal bore diameter
• Precision ground and lapped for exceptional accuracy
• Used for setting dial bore gages to a known dimension
• Ideal for calibrating Holtest internal micrometers
• Essential for accurate setup of inside micrometers
• Hardened steel construction for long-term dimensional stability
• Traceable to NIST standards

Ring gages are critical measurement tools in quality control and precision machining environments. By providing a reference standard, this gage ensures that bore measurement instruments are properly zeroed before taking critical measurements, reducing measurement error and improving process accuracy.