What is the measuring range of this Mitutoyo inside micrometer?

The measuring range spans from 40 mm to 300 mm using the included extension rods.

What is the graduation of this measuring tool?

This inside micrometer features an analogue scale graduation of 0.01 mm.

How do you adjust the required measuring lengths?

You combine the micrometer head with the interchangeable tubular extension rods.

What is this tubular inside micrometer used for?

It is designed for accurate internal measurements of bores, cylinders, and internal recesses.

MITUTOYO 139-203 spear micrometer 40-300mm with extensions

Name: MITUTOYO 139-203 spear micrometer 40-300mm with extensions
Brand: MITUTOYO
SKU: 02257196
Price: 394.6 EUR
Availability: PreOrder

Supplier number: MITUTOYO 139-203 | EAN 4946368018690

394.60 tax incl.

€326.12 excl. VAT (incl. all environmental contributions)

On order: delivered from 14/10/2026

Ordered before 20:00 - delivered as of 14/10/2026
Free shipping
Delivery by DHL

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Accurate internal measurements with Mitutoyo

Practical benefits

Adaptable modular measuring range: The interchangeable extension rods allow you to easily cover wide internal dimensions from 40 to 300 mm.
Clear high precision reading: With a fine 0.01 mm graduation, you can measure internal bores and cylinders with dependable accuracy.
Wear resistant measuring faces: Hardened contact surfaces ensure lasting durability and reliable repeatability across all your dimensional checks.

In a nutshell

The right choise for

With the Mitutoyo 139-203 tubular inside micrometer, you can carry out precise internal measurements across large bores, cylinders, and tubes. The interchangeable extension rods allow you to easily adapt the measuring range from 40 mm to 300 mm, eliminating the need for multiple individual tools. a clear 0.01 mm scale graduation ensures dependable accuracy for tight-tolerance machining and quality control inspections. In addition, the durable wear-resistant measuring faces deliver lasting stability and repeatable dimensional checks throughout demanding workshop tasks.

Product information FAQ

€394.60

tax incl.

Key features according to our expert

Micrometer type: Inside micrometer
Min. measuring value: 40 mm
Max. measuring value: 300 mm
Scale division: 0,01 mm mm

Product description:

This is a model internal screw gauge with extensions that offers you the following advantages:
- Interchangeable extensions in a hollow pipe design.
- Carbide measuring surfaces.

All Features

Micrometer type: Inside micrometer
Min. measuring value: 40 mm
Max. measuring value: 300 mm
Scale division: 0,01 mm mm

Brand MITUTOYO
02257196
EAN 4946368018690
Supplier number MITUTOYO 139-203

Frequently asked questions about this product

Answered by specialists

What is the measuring range of this Mitutoyo inside micrometer?: The measuring range spans from 40 mm to 300 mm using the included extension rods.
What is the graduation of this measuring tool?: This inside micrometer features an analogue scale graduation of 0.01 mm.
How do you adjust the required measuring lengths?: You combine the micrometer head with the interchangeable tubular extension rods.
What is this tubular inside micrometer used for?: It is designed for accurate internal measurements of bores, cylinders, and internal recesses.