Metric Gauge Blocks | McMaster-Carr

Filter by

System of Measurement

Gauge Size

Shape

Length

Width

Gauge Block Grade

Material

Manufacturer

RoHS Compliance

REACH Compliance

DFARS Compliance

Forward

How can we improve?

42 Products

Gauge Blocks

Rectangular

Vital for dimensional quality control, these gauge blocks are often used for precision layout, machine setup, and producing close-tolerance dies and fixtures. All are high-carbon, high-chrome steel and have excellent stability and resistance to thermal expansion.

Gauge blocks are classified by grade based on tolerance—the smaller the tolerance, the greater the accuracy. All blocks are individually numbered for recalibration at a later date.

Size refers to the distance between the block’s two measuring surfaces. To get a size that isn’t offered, press two clean blocks together with a twisting/sliding motion.

For technical drawings and 3-D models, click on a part number.

Rectangular
Gauge Size	Gauge Size Tolerance	Lg.	Wd.	Manufacturer	Material	Specifications Met		Each
Grade 0
0.2mm	-0.00014mm to 0.00014mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	0000000
0.4mm	-0.00014mm to 0.00014mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	000000
0.5mm	-0.00014mm to 0.00014mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
0.7mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
1mm	-0.00014mm to 0.00014mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
1.03mm	-0.00014mm to 0.00014mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
1.3mm	-0.00014mm to 0.00014mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
1.4mm	-0.00014mm to 0.00014mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
1.5mm	-0.00014mm to 0.00014mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
2mm	-0.00014mm to 0.00014mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
2.5mm	-0.00014mm to 0.00014mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
3mm	-0.00014mm to 0.00014mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
3.5mm	-0.00014mm to 0.00014mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
4mm	-0.00014mm to 0.00014mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
5mm	-0.00014mm to 0.00014mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
5.5mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
6mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
7mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
8mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
9.5mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
10mm	-0.00012mm to 0.00012mm	30mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
11.5mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
12mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
13mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
14mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
15mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
17.5mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
18mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
20mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
21mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
22mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
24mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
25mm	-0.00014mm to 0.00014mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
30mm	-0.0002mm to 0.0002mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
40mm	-0.0002mm to 0.0002mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
50mm	-0.0002mm to 0.0002mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
70mm	-0.00025mm to 0.00025mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
75mm	-0.00025mm to 0.00025mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
80mm	-0.0003mm to 0.0003mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
100mm	-0.0003mm to 0.0003mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	00000
150mm	-0.0004mm to 0.0004mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	000000
200mm	-0.0005mm to 0.0005mm	35mm	9mm	Mitutoyo	Steel	ASME B89.1.9	0000000	000000