Does the set come with a certificate?

Yes, the gage block set includes a certificate from the manufacturer. However, for true NIST traceability and to ensure the highest level of accuracy, we recommend having the set calibrated by an accredited laboratory.

What does "Grade B" mean?

Grade B refers to compliance with ASME B89.1.9-2002 standards. This grade is ideal for general-purpose shop use, offering reliable performance for a variety of measurement tasks.

Can I use a caliper to calibrate the gage blocks?

No, gage blocks are more accurate than calipers. Use the gage blocks to calibrate the caliper instead. For calibrating the gage blocks, a higher-accuracy tool like a micrometer is recommended.

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We remain fully operational. Our teams are working around the clock to ensure your deliveries continue safely.

DOWNLOAD THE APP

WE SOURCE ITEMS FROM

UAE
UK
India
USA
Japan

Customer Services

About Us

Customer Support

Our Other Brands:Hewyn|Selfship

Description

📏 Measure Like a Pro, Own the Precision.

BUILT TO LAST - Hardened to HRC 64 for superior durability and corrosion resistance.
TRUSTED STANDARD - Meets and exceeds federal spec GGG-G-15C and ASME B89.1.9-2002 requirements.
THERMAL STABILITY - Calibrated at 68°F (20°C) with a low thermal expansion coefficient (6.4 x 10⁻⁶).
PRECISION PERFECTED - 81-piece Grade B set engineered for industrial-grade accuracy.
CERTIFIED CONFIDENCE - Each block serialized with a certificate detailing exact deviation.

The Accusize 81-piece Steel Gauge Block Set delivers industrial-grade precision with hardened steel blocks calibrated at 20°C, each serialized and certified for traceable accuracy. Engineered to resist corrosion and thermal distortion, this Grade B set meets stringent federal and ASME standards, making it the go-to tool for professionals demanding flawless measurement reliability.

Specifications

ASIN	B00HNU3JDU
Batteries Required?	No
Batteries included?	No
Customer Reviews	4.7 4.7 out of 5 stars (380)
Date First Available	2 May 2016
Included Components	MFG's certificate, Solid Case, Steel Gauge Blocks
Item Package Quantity	1
Item Weight	2.69 kg
Item model number	P900-S581
Manufacturer	Accusize Co., Ltd.
Material	Hardened Steel
Part Number	P900-S581
Product Dimensions	34 x 7 x 22 cm; 2.69 kg
Shape	Rectangle
Style	Grade B

Reviews

A**N

EXCELENTE

20.07.2022

Q**O

This is a very good set of gage blocks and work as intended.

2.07.2025

G**E

For the price these work just fine.

16.01.2026

C**S

I bought the grade AS-2. I tested roughly %20 of the set with micrometers so far. All have measured perfect. The box is well done also.

23.11.2025

M**N

Very nice gauge block set for shop-floor ,it was a concern for the surface finish(read some reviews) but was like a mirror finish ,inspected each block and all within spec.

19.11.2019

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