Metric Sight Glass | McMaster-Carr

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	Thread Type Thread Type

Metric

	System of Measurement System of Measurement	Show

Metric

	System of Measurement System of Measurement	Hide

Inch

Metric

	Thread Size Thread Size

	For Use With For Use With

Diesel Fuel

Hydraulic Fluid

Water

	Material Material

Glass

Plastic

	Connection Style Connection Style

	Threaded

	Connection Type Connection Type

	Pipe

	Window Material Window Material

Plastic

	Mount Type Mount Type

Screw

	Window Diameter Window Diameter

	Hex Size Hex Size

	Gender Gender

Male

	Seal Material Seal Material

Rubber

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Minimum Temperature Minimum Temperature

-49° to 0° F

Not Rated

	Maximum Temperature Maximum Temperature

Less than 250° F

250° to 499° F

2,000° F or greater

	ID ID

	OD OD

	Shape Shape


Rod and Disc	Round Tube

	Maximum Pressure Maximum Pressure

Not Rated

	Diameter Diameter

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76 Products

Shatter-Resistant Sights

The window and body are made from a single piece of plastic, making these sights more shatter resistant than sights with a glass window. They are not rated for pressure.

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

				Temp. Range, °F
Thread Size	Window Dia.	Hex Size	Max. Pressure	Min.	Max.	For Use With	Window Material	Seal Material		Each
Plastic
Metric Male Thread
M16 × 1.5 mm	7/16"	3/4"	Not Rated	-20°	210°	Water, Hydraulic Fluid, Diesel Fuel	Plastic	Buna-N Rubber	00000000	00000
M20 × 1.5 mm	9/16"	7/8"	Not Rated	-20°	210°	Water, Hydraulic Fluid, Diesel Fuel	Plastic	Buna-N Rubber	00000000	0000
M25 × 1.5 mm	11/16"	1 1/16"	Not Rated	-20°	210°	Water, Hydraulic Fluid, Diesel Fuel	Plastic	Buna-N Rubber	00000000	0000
M27 × 1.5 mm	13/16"	1 1/16"	Not Rated	-20°	210°	Water, Hydraulic Fluid, Diesel Fuel	Plastic	Buna-N Rubber	00000000	0000
M30 × 1.5 mm	7/8"	1 3/16"	Not Rated	-20°	210°	Water, Hydraulic Fluid, Diesel Fuel	Plastic	Buna-N Rubber	00000000	0000
M40 × 1.5 mm	1 3/16"	1 5/8"	Not Rated	-20°	210°	Water, Hydraulic Fluid, Diesel Fuel	Plastic	Buna-N Rubber	00000000	0000

Borosilicate Glass Rods and Discs

Color: Clear
Max. Temperature: 445° F
Fabrication: Annealed

Also called Pyrex and Schott glass, this glass resists clouding and pitting and is highly chemical and heat resistant. With a low rate of thermal expansion, it stays dimensionally stable during changes in temperature.

Also Available: Other disc sizes. Please select 8477K98 and specify the diameter and length.

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

Rods

				12" Lg.		24" Lg.
Diameter	Diameter Tolerance	Edge Fabrication	Specifications Met		Each		Each
Metric
2mm	-0.400mm to 0.400mm	Ground	MIL-G-47033	000000	00000	000000	00000
3mm	-0.400mm to 0.400mm	Ground	MIL-G-47033	0000000	0000	0000000	0000
4mm	-0.400mm to 0.400mm	Ground	MIL-G-47033	0000000	0000	0000000	0000
5mm	-0.400mm to 0.400mm	Ground	MIL-G-47033	0000000	0000	0000000	0000
6mm	-0.400mm to 0.400mm	Ground	MIL-G-47033	0000000	0000	0000000	0000
7mm	-0.400mm to 0.400mm	Ground	MIL-G-47033	0000000	0000	0000000	0000
8mm	-0.400mm to 0.400mm	Ground	MIL-G-47033	0000000	0000	0000000	0000

Borosilicate Glass Tubes

Color: Clear
Max. Temperature: 445° F
Fabrication: Annealed

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

					12" Lg.
OD	ID	Wall Thick.	Edge Fabrication	Specifications Met		Each
Metric
5mm	0.600mm	2.2mm	Ground	MIL-G-47033	0000000	00000
6mm	1.200mm	2.4mm	Ground	MIL-G-47033	0000000	0000
6mm	2.700mm	1.65mm	Ground	MIL-G-47033	0000000	0000
7mm	3.000mm	2mm	Ground	MIL-G-47033	0000000	0000
8mm	3.000mm	2.5mm	Ground	MIL-G-47033	0000000	0000
9mm	3.000mm	3mm	Ground	MIL-G-47033	0000000	00000

Ultra-High-Temperature Quartz Glass Rods and Discs

Color: Clear
Max. Temperature: 2100° F
Fabrication: Annealed

Able to withstand temperatures up to 2100° F, this quartz glass is useful in high-temperature applications that also require optical clarity, such as high-intensity lighting, fiber-optic production, and optical lens systems. It provides excellent UV transmission, as well as high transmission in the visible and infrared ranges.

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

Rods

				12" Lg.
Dia., mm	Dia. Tolerance, mm	Edge Fabrication	Lg. Tolerance		Each
1	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	00000
1.5	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	000
2	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	000
2.5	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	0000
3	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	0000
3.5	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	0000
4	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	0000
5	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	0000
6	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	0000
6.4	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	0000
7	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	0000
8	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	0000
9	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	00000
10	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	00000
11	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	00000
12	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	00000
13	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	00000
14	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	00000
15	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	00000
16	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	00000
17	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	00000
18	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	00000
19	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	00000
20	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	00000
22	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	00000
24	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	00000
25	-0.380 to 0.380	Ground	-0.125" to 0.125"	00000000	00000

Ultra-High-Temperature Quartz Glass Tubes

Color: Clear
Max. Temperature: 2000° F
Fabrication: Annealed

Blistering temperatures won’t melt these quartz tubes, and rapid temperature shifts won’t cause them to crack. Even tougher than borosilicate, they can be used in furnaces and ovens heated up to 2000° F. These highly pure tubes are often used in laboratories because they won’t leach impurities into samples or contaminate chemical reactions. Quartz tubes are optically clear and have excellent UV transmission, making them ideal for UV purification systems.

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

				12" Lg.
OD	ID	Wall Thick.	Edge Fabrication		Each
Metric
3mm	1.000mm	1mm	Ground	00000000	00000
4mm	2.000mm	1mm	Ground	00000000	0000
5mm	3.000mm	1mm	Ground	00000000	0000
6mm	4.000mm	1mm	Ground	00000000	0000
7mm	5.000mm	1mm	Ground	00000000	0000
8mm	6.000mm	1mm	Ground	00000000	0000
9mm	7.000mm	1mm	Ground	0000000	0000
10mm	8.000mm	1mm	Ground	0000000	0000
11mm	9.000mm	1mm	Ground	0000000	0000
12mm	10.000mm	1mm	Ground	0000000	0000
13mm	11.000mm	1mm	Ground	0000000	0000
14mm	12.000mm	1mm	Ground	0000000	0000
15mm	13.000mm	1mm	Ground	0000000	0000
16mm	14.000mm	1mm	Ground	0000000	0000
17mm	15.000mm	1mm	Ground	0000000	0000
18mm	16.000mm	1mm	Ground	0000000	0000
19mm	16.000mm	1.5mm	Ground	0000000	00000
20mm	17.000mm	1.5mm	Ground	0000000	00000
21.6mm	18.000mm	1.8mm	Ground	0000000	00000
22mm	19.000mm	1.5mm	Ground	0000000	00000
23mm	20.000mm	1.5mm	Ground	0000000	00000
24mm	20.000mm	2mm	Ground	0000000	00000
25mm	22.000mm	1.5mm	Ground	0000000	00000