Mitutoyo 368-272 Holtest Inside Micrometer 3-3.5 Inch Range 0.0002 Inch Resolution

The Mitutoyo 368-272 Holtest is a precision inside micrometer designed for accurate internal diameter measurements in the 3 to 3.5 inch range. With a resolution of 0.0002 inches, this instrument delivers exceptional accuracy for demanding measurement applications in machine shops, quality control labs, and manufacturing environments.

Key Features:

• Measurement range: 3 to 3.5 inches
• Resolution: 0.0002 inches (0.005mm) for precise internal diameter measurements
• Titanium nitride (TiN) coated contact points for superior wear resistance and extended tool life
• Carbide-tipped contact points ensure exceptional durability in production environments
• Ratchet stop mechanism provides consistent measuring force for repeatable results
• Compatible with optional setting rings for convenient zero-point adjustments and calibration

The Holtest design features a three-point contact system that ensures accurate centering and reliable measurements of bore diameters, cylinder bores, and other internal dimensions. The ratchet stop thimble helps operators achieve uniform contact pressure, reducing operator influence and improving measurement consistency across multiple users.