


📐 Elevate your precision game — because accuracy isn’t optional.
The Mitutoyo 611201-531 Steel Rectangular Gage Block is a 1.0-inch nominal length precision tool made from high-carbon, high-chrome steel. Certified to ASME Grade 0 standards, it ensures exceptional flatness, parallelism, and surface finish. Laser-etched markings provide traceability, while its rectangular base allows for accurate wringing with other blocks. Supplied with a Mitutoyo inspection certificate traceable to NIST, this gage block is ideal for calibrating and verifying the accuracy of measuring instruments in professional metrology and manufacturing environments.











| Customer Reviews | 4.6 out of 5 stars 82 Reviews |
L**S
Nice gauge block
I use this gauge block to test my micrometers and calipers precision. Both of my equipment read exactly what was stated by Mitutoyos gauge block, so the block is accurate and so is my equipment. Overall, great block don't hesitate to buy if you are in need of one or more.
L**R
What's there to say, it's a gauge block
While just a chunk of metal it is great that it allows you to check various measuring devices to see how accurate they are as well as let you see the consistency of your measurements. Have a tool that's not performing as expected, use this gauge block. Have an operator that is not measuring correctly, test them with this gauge block.
S**S
A great little block to check devices.
We have a full set at work, and now i decided to add a few at home to just keep a check on my home devices. Can't go wrong with Mitutoyo high quality.
B**K
Five Stars
Super, Mitutoyo tool were always made to precision and they still are. Just the tool I needed. Thank you.
S**T
Four Stars
Does exactly what it's supposed to do. Flawless. High quality product. Made in Japan.
A**N
Excellent gage block
Excellent gage block. The one inch dimension accurate beyond a 5 decimal place caliper's ability to measure. Comes with NIST traceable reference number.
A**O
if you use a dial caliper or a micrometer you need this.
For me it's perfect. I had one and misplaced it, you need this.
D**.
Not exciting but it works
OK, what to say about a hunk of metal. If you are a bit klutsy, like me, it's a very useful piece that allows me to practice my skill at correctly measuring or calibrating while using a caliper (you know who you are). :-)
Trustpilot
2 months ago
2 months ago