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Mitutoyo 368-273 Holetest 3.5 - 4" Carbide,TN

Mitutoyo 368 Holtest Series

  • Measures internal diameters from 0.08" to 12"
  • Self-centering 3-point contact
  • Mechanical design
  • Ideal for blind and short bore measurement
  • High accuracy
by Mitutoyo
$1,950.00
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Mitutoyo 368 Holtest Series

The Mitutoyo 368 Holtest Series (Inch) provides precise, repeatable internal diameter measurements using a proven self-centering 3-point measuring system. Designed for accuracy and durability, these mechanical Holtest gages deliver stable results even in short or blind bores. With a comprehensive measuring range from 0.08 in to 12 in, the 368 Series supports inspection, setup, and quality control across machining, aerospace, automotive, and general manufacturing applications.

 

Key Features

  • Inch measuring range from 0.08" to 12"
  • Self-centering 3-point contact for consistent bore measurement
  • Mechanical operation - no batteries or electronics
  • High accuracy across small and large diameter ranges
  • Ideal for blind and short bores
  • Rugged construction for shop-floor reliability

 

Specifications

Inch SKU Number Inch Range Accuracy Extension Rod
368-021 0.08 in - 0.1 in
±2μm (max diff. 2μm)
±0.0001 in (max diff. 0.0001 in)
-
368-022 0.1 in - 0.12 in
368-023 0.12 in - 0.16 in
368-024 0.16 in - 0.2 in
368-025 0.2 in - 0.24 in
368-026 0.24 in - 0.28 in
368-261 0.275 in - 0.35 in
368-262 0.35 in - 0.425 in
100mm (952322)
368-263 0.425 in - 0.5 in
368-264 0.5 in - 0.65 in
±3μm (max diff. 3μm)
±0.00015 in (max diff. 0.00015 in)
150mm (952621)
368-265 0.65 in - 0.8 in
368-266 0.8 in - 1 in
150mm (952622)
368-267 1 in - 1.2 in
368-268 1.2 in - 1.6 in
368-269 1.6 in - 2 in
368-270 2 in - 2.5 in
150mm (952623)
368-271 2.5 in - 3 in
±4μm (max diff. 4μm)
±0.0002 in (max diff. 0.0002 in)
368-272 3 in - 3.5 in
368-273 3.5 in - 4 in
368-274 4 in - 5 in
±5μm (max diff. 5μm)
±0.00025 in (max diff. 0.00025 in)
368-275 5 in - 6 in
368-276 6 in - 7 in
368-277 7 in - 8 in
368-278 8 in - 9 in
±6μm (max diff. 6μm)
±0.0003 in (max diff. 0.0003 in)
368-279 9 in - 10 in
368-280 10 in - 11 in
368-281 11 in - 12 in

 

Items Included

  • Mitutoyo 368 Holtest (selected model)
  • Measuring head assembly
  • Extension rod (Sold Separately)
  • Manufacturer documentation

 

INSIZE ISHW-L20B Webster Hardness Tester ManualMitutoyo 368 Holtest Series Catalog

Mitutoyo 368 Holtest Series

$1,950.00

Description

Mitutoyo 368 Holtest Series

The Mitutoyo 368 Holtest Series (Inch) provides precise, repeatable internal diameter measurements using a proven self-centering 3-point measuring system. Designed for accuracy and durability, these mechanical Holtest gages deliver stable results even in short or blind bores. With a comprehensive measuring range from 0.08 in to 12 in, the 368 Series supports inspection, setup, and quality control across machining, aerospace, automotive, and general manufacturing applications.

 

Key Features

  • Inch measuring range from 0.08" to 12"
  • Self-centering 3-point contact for consistent bore measurement
  • Mechanical operation - no batteries or electronics
  • High accuracy across small and large diameter ranges
  • Ideal for blind and short bores
  • Rugged construction for shop-floor reliability

 

Specifications

Inch SKU Number Inch Range Accuracy Extension Rod
368-021 0.08 in - 0.1 in ±2μm (max diff. 2μm)
±0.0001 in (max diff. 0.0001 in) 		-
368-022 0.1 in - 0.12 in
368-023 0.12 in - 0.16 in
368-024 0.16 in - 0.2 in
368-025 0.2 in - 0.24 in
368-026 0.24 in - 0.28 in
368-261 0.275 in - 0.35 in
368-262 0.35 in - 0.425 in 100mm (952322)
368-263 0.425 in - 0.5 in
368-264 0.5 in - 0.65 in ±3μm (max diff. 3μm)
±0.00015 in (max diff. 0.00015 in) 		150mm (952621)
368-265 0.65 in - 0.8 in
368-266 0.8 in - 1 in 150mm (952622)
368-267 1 in - 1.2 in
368-268 1.2 in - 1.6 in
368-269 1.6 in - 2 in
368-270 2 in - 2.5 in 150mm (952623)
368-271 2.5 in - 3 in ±4μm (max diff. 4μm)
±0.0002 in (max diff. 0.0002 in)
368-272 3 in - 3.5 in
368-273 3.5 in - 4 in
368-274 4 in - 5 in ±5μm (max diff. 5μm)
±0.00025 in (max diff. 0.00025 in)
368-275 5 in - 6 in
368-276 6 in - 7 in
368-277 7 in - 8 in
368-278 8 in - 9 in ±6μm (max diff. 6μm)
±0.0003 in (max diff. 0.0003 in)
368-279 9 in - 10 in
368-280 10 in - 11 in
368-281 11 in - 12 in

 

Items Included

  • Mitutoyo 368 Holtest (selected model)
  • Measuring head assembly
  • Extension rod (Sold Separately)
  • Manufacturer documentation

 

INSIZE ISHW-L20B Webster Hardness Tester ManualMitutoyo 368 Holtest Series Catalog

Shipping

Shipping is FREE on all orders shipped to the continental USA. We don't want to mess around with fine print and extra charges, we like things to be simple and easy.

Why Buy From Us

We get it. You've got a lot of choice when it comes to online retailers. Here's why we think you should shop with us at Precision Engineering Supply. But first, you should definitely hear from our customers here. Free Shipping for the continental USA. No extra charges. Ever. Price Match Guarantee. Best prices online guaranteed. 30 Day Easy Returns. If you're not happy with your product, we'll take it back no questions asked. Great Service. We pride ourselves on the best service, anywhere. Your Satisfaction Guaranteed. We handpick our products for quality, we know you'll love them. But is there is ever something wrong, we'll fix it.

Se Habla Español - Falamos Português

Pricing

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.

Returns

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.

Financing

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.

  • Inch measuring range from 0.08" to 12"
  • Self-centering 3-point contact for consistent bore measurement
  • Mechanical operation - no batteries or electronics
  • High accuracy across small and large diameter ranges
  • Ideal for blind and short bores
  • Rugged construction for shop-floor reliability
  • Measures internal diameters from 0.08" to 12"
  • Self-centering 3-point contact for repeatable accuracy
  • Mechanical design for dependable shop-floor use
  • Ideal for blind and short bore measurement
  • High accuracy across all size ranges
  • Backed by Mitutoyo’s proven quality and precision
Description

Mitutoyo 368 Holtest Series

The Mitutoyo 368 Holtest Series (Inch) provides precise, repeatable internal diameter measurements using a proven self-centering 3-point measuring system. Designed for accuracy and durability, these mechanical Holtest gages deliver stable results even in short or blind bores. With a comprehensive measuring range from 0.08 in to 12 in, the 368 Series supports inspection, setup, and quality control across machining, aerospace, automotive, and general manufacturing applications.

 

Key Features

  • Inch measuring range from 0.08" to 12"
  • Self-centering 3-point contact for consistent bore measurement
  • Mechanical operation - no batteries or electronics
  • High accuracy across small and large diameter ranges
  • Ideal for blind and short bores
  • Rugged construction for shop-floor reliability

 

Specifications

Inch SKU Number Inch Range Accuracy Extension Rod
368-021 0.08 in - 0.1 in ±2μm (max diff. 2μm)
±0.0001 in (max diff. 0.0001 in) 		-
368-022 0.1 in - 0.12 in
368-023 0.12 in - 0.16 in
368-024 0.16 in - 0.2 in
368-025 0.2 in - 0.24 in
368-026 0.24 in - 0.28 in
368-261 0.275 in - 0.35 in
368-262 0.35 in - 0.425 in 100mm (952322)
368-263 0.425 in - 0.5 in
368-264 0.5 in - 0.65 in ±3μm (max diff. 3μm)
±0.00015 in (max diff. 0.00015 in) 		150mm (952621)
368-265 0.65 in - 0.8 in
368-266 0.8 in - 1 in 150mm (952622)
368-267 1 in - 1.2 in
368-268 1.2 in - 1.6 in
368-269 1.6 in - 2 in
368-270 2 in - 2.5 in 150mm (952623)
368-271 2.5 in - 3 in ±4μm (max diff. 4μm)
±0.0002 in (max diff. 0.0002 in)
368-272 3 in - 3.5 in
368-273 3.5 in - 4 in
368-274 4 in - 5 in ±5μm (max diff. 5μm)
±0.00025 in (max diff. 0.00025 in)
368-275 5 in - 6 in
368-276 6 in - 7 in
368-277 7 in - 8 in
368-278 8 in - 9 in ±6μm (max diff. 6μm)
±0.0003 in (max diff. 0.0003 in)
368-279 9 in - 10 in
368-280 10 in - 11 in
368-281 11 in - 12 in

 

Items Included

  • Mitutoyo 368 Holtest (selected model)
  • Measuring head assembly
  • Extension rod (Sold Separately)
  • Manufacturer documentation

 

INSIZE ISHW-L20B Webster Hardness Tester ManualMitutoyo 368 Holtest Series Catalog

Shipping

Shipping is FREE on all orders shipped to the continental USA. We don't want to mess around with fine print and extra charges, we like things to be simple and easy.

Why Buy From Us

We get it. You've got a lot of choice when it comes to online retailers. Here's why we think you should shop with us at Precision Engineering Supply. But first, you should definitely hear from our customers here. Free Shipping for the continental USA. No extra charges. Ever. Price Match Guarantee. Best prices online guaranteed. 30 Day Easy Returns. If you're not happy with your product, we'll take it back no questions asked. Great Service. We pride ourselves on the best service, anywhere. Your Satisfaction Guaranteed. We handpick our products for quality, we know you'll love them. But is there is ever something wrong, we'll fix it.

Se Habla Español - Falamos Português

Pricing

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.

Returns

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.

Financing

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.