Mitutoyo 368-866 Holtest Type II Inside Micrometer 0.8-1 Inch Range

The Mitutoyo 368-866 Holtest Type II is a precision three-point internal micrometer designed for accurate measurement of bore diameters, hole sizes, and internal dimensions. This model covers a measuring range of 0.8 to 1.0 inch with a resolution of 0.0002 inch, making it ideal for precision machining and quality control applications.

Key Features:

• Three-point contact design with alloyed steel contact points for stable, accurate measurements
• Type II configuration allows measurement closer to the bottom of blind bores
• Ratchet stop mechanism ensures consistent measuring force and repeatable results
• 0.0002 inch graduation for precise readings
• Compact design ideal for measuring internal diameters in tight spaces
• Self-centering geometry reduces operator error

The Holtest's three-point contact system provides superior stability compared to two-point micrometers, automatically centering the tool in the bore for consistent measurements. The ratchet stop prevents over-tightening and ensures uniform contact pressure across measurements. The Type II body style features an extended reach capability, allowing measurements in deeper bores and closer to shoulders than standard internal micrometers.