Series 368 - Mechanical Holtest (Type II) Three-Point Internal Micrometer Complete Set

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Series 368 - Mechanical Holtest (Type II) Three-Point Internal Micrometer Complete Set

Series 368 - Mechanical Holtest (Type II) Three-Point Internal Micrometer Complete Set

Series 368 - Mechanical Holtest (Type II) Three-Point Internal Micrometer Complete Set

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Specification: 368-991

Features & Benefits

The Mitutoyo mechanical Holtest internal micrometer set includes complete gages (micrometer head units and measuring heads) for each size. Three alloy steel anvils evenly spaced at 120° for true alignment of the axis bore for accurate, easily repeatable measurements. Hardened steel spindles with a carbide ball and cones with a carbide pin ensure accuracy and durability when extending and retracting the anvils. The holtests ratchet stop mechanism provides a constant measuring force on the hardened steel spindle to ensure accurate, even measurements.

  • Available in Metric and Inch models
  • Contact points are constructed of hardened steel
  • 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
Remarks: with extension rod

Product List

Order No. Units Range Graduation Accuracy Setting rings included
368-991 Metric 12 - 20mm 0.005mm ±3µm 16
368-992 Metric 20 - 50mm 0.005mm ±3µm 25, 40
368-993 Metric 50 - 100mm 0.005mm ±3, 4µm 87, 62
368-994 Metric 100 - 200mm 0.005mm ±5µm 175, 124
368-995 Inch 0.5-0.8" 0.0002" ±0.00015" .65
368-996 Inch 0.8-2" 0.0002" ±0.00015" .1, 1.6
368-997 Inch 2-4" 0.0002" ±0.00015, 0.0002" 2.5, 3.5
368-998 Inch 4-8" 0.0002" ±0.00025" .5, 7

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.