Mitutoyo 368-274 Holtest Internal Micrometer with Ratchet Stop 4-5 Inch

The Mitutoyo 368-274 Holtest is a precision internal micrometer designed for accurate measurement of bore diameters, hole sizes, and internal dimensions ranging from 4.0 to 5.0 inches. This three-point contact bore gauge features a ratchet stop mechanism that ensures consistent measuring force and repeatable results, making it ideal for quality control and inspection applications in machine shops, manufacturing facilities, and metrology labs.

Key Features:

• Measuring range: 4.0 to 5.0 inches (101.6 to 127.0 mm)
• Carbide-tipped contact points provide exceptional durability and wear resistance for long service life
• TiN (Titanium Nitride) coating on contact points for enhanced hardness and reduced friction
• Ratchet stop ensures uniform measuring pressure for consistent, accurate readings
• Three-point contact design provides stable, self-centering measurement
• Compatible with optional setting rings for precise zero-point calibration and adjustment
• Ergonomic design allows comfortable operation in tight spaces

The Holtest's robust construction and precision-ground components deliver the accuracy and reliability expected from Mitutoyo's professional measuring instruments. The carbide and TiN-coated contact points significantly extend tool life even in demanding production environments with frequent use.