Mitutoyo 368-996 Holtest Inside Micrometer Set Type II 0.8-2 Inch Range

The Mitutoyo 368-996 Holtest is a precision three-point internal micrometer set designed for accurate measurement of bore diameters, hole diameters, and groove widths. This Type II R series set covers a measuring range of 0.8 to 2 inches, making it ideal for quality control and inspection applications requiring high-precision internal measurements.

Key Features:

• Three-point contact design with alloyed steel contact points ensures stable, self-centering measurement
• Type II configuration allows measurements to be taken closer to the bottom of blind bores
• Complete set includes micrometer head units and multiple measuring heads to cover the entire 0.8-2 inch range
• Self-centering mechanism automatically aligns the gauge perpendicular to the bore axis
• Ratchet stop ensures consistent measuring force for repeatable results
• Hardened and precision-ground measuring faces for durability and accuracy

The Holtest three-point internal micrometer provides superior accuracy compared to two-point designs by eliminating the need for perfect alignment. The set configuration includes interchangeable measuring heads that attach to the micrometer unit, providing versatility across the full measurement range while maintaining calibration accuracy. Ideal for measuring cylinders, bearing bores, bushings, and precision machined holes in manufacturing and metrology applications.