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The Mitutoyo 368 Holtest II Series (Inch) delivers fast, reliable internal diameter measurement for production inspection and quality control. Designed with a self-centering 3-point measuring system, the Holtest II ensures stable, repeatable results even in short or blind bores. Its rugged mechanical construction provides dependable accuracy without electronics, making it ideal for shop-floor environments. Available in models covering 0.5 in to 12 in, the 368 Series offers a comprehensive solution for precision bore measurement across a wide range of applications.
| Inch SKU Number | Inch Range | Accuracy | Extension Rod |
| 368-864 | 0.5 in - 0.65 in |
±2μm (within 2μm) (within 0.0001 in) |
150mm (952621) |
| 368-865 | 0.65 in - 0.8 in | ||
| 368-866 | 0.8 in - 1 in |
±3μm (within 3μm) ±0.00015 in (within 0.00015 in) |
150mm (952622) |
| 368-867 | 1 in - 1.2 in | ||
| 368-868 | 1.2 in - 1.6 in | ||
| 368-869 | 1.6 in - 2 in | ||
| 368-870 | 2 in - 2.5 in | 150mm (952623) | |
| 368-871 | 2.5 in - 3 in | ||
| 368-872 | 3 in - 3.5 in | ||
| 368-873 | 3.5 in - 4 in | ||
| 368-874 | 4 in - 5 in |
±5μm (within 5μm) ±0.00025 in (within 0.00025 in) |
|
| 368-875 | 5 in - 6 in | ||
| 368-876 | 6 in - 7 in | ||
| 368-877 | 7 in - 8 in | ||
| 368-878 | 8 in - 9 in | ||
| 368-879 | 9 in - 10 in | ||
| 368-880 | 10 in - 11 in | ||
| 368-881 | 11 in - 12 in |
Shipping is FREE on all orders under 70 pounds shipped to the continental USA.
Freight shipping will be charged on larger, heavier items.
Shipping is FREE on all orders under 70 pounds shipped to the continental USA.
Freight shipping will be charged on larger, heavier items.
Price Match Guarantee.
Best prices online guaranteed.
30 Day Easy Returns.
Se Habla Español - Falamos Português
We will beat ANY price found online! Reach out to us for more information by calling at (617) 398-7852 or emailing us at support@precisionengineeringsupply.com.
Free 30 day returns! We pride ourselves in helping you with your needs Please reach out by calling at (617) 398-7852 or emailing us at support@precisionengineeringsupply.com to start your return.
Enjoy flexible payment options with Affirm. Split your purchase into easy, interest-free installments or choose a financing plan that fits your budget — all available directly at checkout.
The Mitutoyo 368 Holtest II Series (Inch) delivers fast, reliable internal diameter measurement for production inspection and quality control. Designed with a self-centering 3-point measuring system, the Holtest II ensures stable, repeatable results even in short or blind bores. Its rugged mechanical construction provides dependable accuracy without electronics, making it ideal for shop-floor environments. Available in models covering 0.5 in to 12 in, the 368 Series offers a comprehensive solution for precision bore measurement across a wide range of applications.
| Inch SKU Number | Inch Range | Accuracy | Extension Rod |
| 368-864 | 0.5 in - 0.65 in |
±2μm (within 2μm) (within 0.0001 in) |
150mm (952621) |
| 368-865 | 0.65 in - 0.8 in | ||
| 368-866 | 0.8 in - 1 in |
±3μm (within 3μm) ±0.00015 in (within 0.00015 in) |
150mm (952622) |
| 368-867 | 1 in - 1.2 in | ||
| 368-868 | 1.2 in - 1.6 in | ||
| 368-869 | 1.6 in - 2 in | ||
| 368-870 | 2 in - 2.5 in | 150mm (952623) | |
| 368-871 | 2.5 in - 3 in | ||
| 368-872 | 3 in - 3.5 in | ||
| 368-873 | 3.5 in - 4 in | ||
| 368-874 | 4 in - 5 in |
±5μm (within 5μm) ±0.00025 in (within 0.00025 in) |
|
| 368-875 | 5 in - 6 in | ||
| 368-876 | 6 in - 7 in | ||
| 368-877 | 7 in - 8 in | ||
| 368-878 | 8 in - 9 in | ||
| 368-879 | 9 in - 10 in | ||
| 368-880 | 10 in - 11 in | ||
| 368-881 | 11 in - 12 in |
Shipping is FREE on all orders under 70 pounds shipped to the continental USA.
Freight shipping will be charged on larger, heavier items.
Shipping is FREE on all orders under 70 pounds shipped to the continental USA.
Freight shipping will be charged on larger, heavier items.
Price Match Guarantee.
Best prices online guaranteed.
30 Day Easy Returns.
Se Habla Español - Falamos Português
We will beat ANY price found online! Reach out to us for more information by calling at (617) 398-7852 or emailing us at support@precisionengineeringsupply.com.
Free 30 day returns! We pride ourselves in helping you with your needs Please reach out by calling at (617) 398-7852 or emailing us at support@precisionengineeringsupply.com to start your return.
Enjoy flexible payment options with Affirm. Split your purchase into easy, interest-free installments or choose a financing plan that fits your budget — all available directly at checkout.
Mitutoyo 368 Holtest II Series (Inch) Catalog