Mitutoyo 368-876
$653
Three-point inside micrometer with 6–7″ range, hardened alloy steel contact points, and ratchet stop for consistent, accurate bore measurements.
Mitutoyo 368-876 Holtest Inside Micrometer, type II, 6 to 7″.
The Mitutoyo 368-876 Holtest Inside Micrometer is a precision instrument engineered for accurate internal diameter measurements across a 6 to 7-inch range. As part of Mitutoyo’s trusted Type II Holtest series, it features three-point contact for superior repeatability, even in slightly out-of-round holes. With hardened steel contact points (HRC >60), a ratchet stop for constant measuring force, and compatibility with optional extension rods and setting rings, it is ideal for professional use in quality control, machining, and inspection environments.
This model allows measurements closer to the bottom of blind bores—making it an excellent tool for challenging internal gauging applications.
Key Features
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Measurement range: 6 to 7 inches
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Three-point contact system ensures high repeatability and self-centering
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Alloy steel contact points, hardened to over HRC 60 for durability
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Ratchet stop mechanism provides consistent measuring force
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Optional extension rods enable deeper hole measurements
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Compatible with optional setting rings for zero-point calibration
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Supplied in a sturdy wooden case for models over 100 mm (4″)
Why Choose the Mitutoyo 368-876?
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Precision Engineering: Trusted Japanese craftsmanship and metrology leadership.
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Enhanced Access: Perfect for blind bores and deep internal diameter measurements.
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Modular Compatibility: Expand usability with optional accessories like setting rings and extension rods.
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Industry Standard: Ideal for workshops, inspection labs, and calibration service providers.
What’s Included
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Mitutoyo 368-876 Inside Micrometer Head
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Protective Wooden Case
Note: Setting rings and extension rods sold separately.
Technical Specifications
| Specification | Details |
|---|---|
| Measurement Range | 6 to 7 inches |
| Graduation | .0002 inch |
| Accuracy | ±.00025 inch |
| Measuring Method | 3-point internal measurement |
| Contact Point Material | Hardened Alloy Steel (HRC >60) |
| Body Type | Holtest Type II |
| Extension Rod Support | Yes (Optional) |
| Setting Ring Support | Yes (Optional) |
| Case Type | Wooden |
Applications
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Bore diameter measurement
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Quality inspection in machining and manufacturing
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Blind hole and deep bore measurement
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Calibration labs and metrology centers
Related Categories and Resources
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Browse more in our Dimensional Measuring Tools collection.
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Learn about calibration accuracy in our article: How to Calibrate a Pressure Transmitter Using a Loop Calibrator
