Series 368 - Mechanical Holtest (Type II) Three-Point Internal Micrometers

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Series 368 - Mechanical Holtest (Type II) Three-Point Internal Micrometers

Series 368 - Mechanical Holtest (Type II) Three-Point Internal Micrometers

Series 368 - Mechanical Holtest (Type II) Three-Point Internal Micrometers

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Specification: 368-764

Features & Benefits

The Mitutoyo mechanical Holtest internal micrometer features three alloy steel anvils evenly spaced at 120° for true alignment of the axis bore for accurate, easily repeatable measurements. A hardened steel spindle with a carbide ball and cone with a carbide pin ensure accuracy and durability when extending and retracting the anvils. The holtest’s ratchet stop mechanism provides a constant measuring force on the hardened-steel spindle to ensure accurate, even measurements.

  • Available in Metric and Inch models
  • Optional extension rod allows for measuring deep holes
  • Optional setting rings for zero point adjustment are available
  • Design allows for measurements closer to the bottom of blind bore holes
  • Scale on thimble and sleeve is laser etched for easier reading in all conditions
  • Holtests up to 100mm / 4″ diameter measurements supplied in a fitted plastic case
  • Holtests over 100mm / 4″ diameter measurements supplied in a wooden case

SERIES 368 Technical Data

Technology: Mechanical
Contact Point: Alloy Steel
Measuring Method: Three-point method
Ratchet/Thimble: Ratchet Stop

Product List

Order No. Units Range Graduation Accuracy Main Body Assembly Mass Extension Rod (Optional)
368-764 Metric 12 - 16mm 0.005mm ±3µm 04AZA839 150g 952621
368-765 Metric 16 - 20mm 0.005mm ±3µm 04AZA840 150g 952621
368-766 Metric 20 - 25mm 0.005mm ±3µm 04AZA848 260g 952622
368-767 Metric 25 - 30mm 0.005mm ±3µm 04AZA849 280g 952622
368-768 Metric 30 - 40mm 0.005mm ±3µm 04AZA857 290g 952622
368-769 Metric 40 - 50mm 0.005mm ±3µm 04AZA858 330g 952622
368-770 Metric 50 - 63mm 0.005mm ±3µm 04AZA870 440g 952623
368-771 Metric 62 - 75mm 0.005mm ±4µm 04AZA871 450g 952623
368-772 Metric 75 - 88mm 0.005mm ±4µm 04AZA872 560g 952623
368-773 Metric 87 - 100mm 0.005mm ±4µm 04AZA873 570g 952623
368-774 Metric 100 - 125mm 0.005mm ±5µm 04AZA895 1020g 952623
368-775 Metric 125 - 150mm 0.005mm ±5µm 04AZA896 1110g 952623
368-776 Metric 150 - 175mm 0.005mm ±5µm 04AZA897 1200g 952623
368-777 Metric 175 - 200mm 0.005mm ±5µm 04AZA898 1300g 952623
368-778 Metric 200 - 225mm 0.005mm ±6µm 04AZA899 1420g 952623
368-779 Metric 225 - 250mm 0.005mm ±6µm 04AZA900 1540g 952623
368-780 Metric 250 - 275mm 0.005mm ±6µm 04AZA901 1690g 952623
368-781 Metric 275 - 300mm 0.005mm ±6µm 04AZA902 1860g 952623
368-864 Inch 0.5-0.65" 0.0002" ±0.00015" 04AZA841 150g 952621
368-865 Inch 0.65-0.8" 0.0002" ±0.00015" 04AZA842 150g 952621
368-866 Inch 0.8-1" 0.0002" ±0.00015" 04AZA850 260g 952622
368-867 Inch 1-1.2" 0.0002" ±0.00015" 04AZA851 280g 952622
368-868 Inch 1.2-1.6" 0.0002" ±0.00015" 04AZA859 290g 952622
368-869 Inch 1.6-2" 0.0002" ±0.00015" 04AZA860 330g 952622
368-870 Inch 2-2.5" 0.0002" ±0.00015" 04AZA874 440g 952623
368-871 Inch 2.5-3" 0.0002" ±0.00020" 04AZA875 450g 952623
368-872 Inch 3-3.5" 0.0002" ±0.00020" 04AZA876 560g 952623
368-873 Inch 3.5-4" 0.0002" ±0.00020" 04AZA877 570g 952623
368-874 Inch 4-5" 0.0002" ±0.00025" 04AZA903 1020g 952623
368-875 Inch 5-6" 0.0002" ±0.00025" 04AZA904 1110g 952623
368-876 Inch 6-7" 0.0002" ±0.00025" 04AZA905 1200g 952623
368-877 Inch 7-8" 0.0002" ±0.00025" 04AZA906 1300g 952623
368-878 Inch 8-9" 0.0002" ±0.00030" 04AZA907 1420g 952623
368-879 Inch 9-10" 0.0002" ±0.00030" 04AZA908 1540g 952623
368-880 Inch 10-11" 0.0002" ±0.00030" 04AZA909 1690g 952623
368-881 Inch 11-12" 0.0002" ±0.00030" 04AZA910 1860g 952623

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.