Glass Sights | McMaster-Carr

	Pipe Size Pipe Size

	Thread Type Thread Type

UN/UNF (SAE Straight)

	Material Material

	For Use With For Use With

	Maximum Pressure Maximum Pressure

	System of Measurement System of Measurement

Inch

Metric

	Window Diameter Window Diameter

	Maximum Temperature Maximum Temperature

	For Liquid Type For Liquid Type

Clear

Dark

	Window Material Window Material

Glass

Plastic

Quartz

	Connection Style Connection Style

Threaded

Flanged

Quick Clamp

	Connection Type Connection Type


Pipe	Tube

	Mount Type Mount Type

	Gender Gender

Male

Female

	Hex Size Hex Size

	Minimum Temperature Minimum Temperature

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

DFARS Specialty Metals
COTS-Exempt

	Thread Size Thread Size

	Connection Center-to-Center Connection Center-to-Center

	Seal Material Seal Material

Buna-N Rubber

Neoprene Rubber

Silicone Rubber

Fluoroelastomer Rubber

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

RoHS Compliant

RoHS Compliant with
Exemptions

	Shape Shape

Straight

90° Elbow

Cap/Plug

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

REACH Compliant

Forward

How can we improve?

690 Products

Sights

These sights have a glass window.

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.

High-Visibility Sights

Easily view liquid movement and level changes from a distance—these sights have an indicator ball inside the glass window.

Easy-View All-Plastic Sights

Machined from one piece of stain- and impact-resistant plastic.

Easy-View Sights

View tank contents from multiple angles through the plastic domed window.

Sights for Oil Inspection

Continuously monitor oil quality through the clear plastic reservoir, and use the attached drain valve to remove water accumulation.

High-Pressure Sights

With a thick glass window fused to a metal body, these sights resist cracking at high pressures.

High-Temperature Sights

Often used in kilns and other heating equipment, these sights have a quartz window that can withstand temperatures up to 1600° F. They're also known as peep sights.

Flanged Sights

Fasten the extended flange to tank walls.

Through-Wall Sights

Mount these sights from the inside of your tank and secure with a lock nut.

Press-Fit Through-Wall Sights

Press these sights into a hole in your tank wall; no additional mounting nuts are needed. They mount from the outside.

Weld-On Sights

Weld these sights to single-wall tanks.

Sights for Quick-Clamp Sanitary Tube Fittings

Monitor food, brewery, chemical, pharmaceutical, and biotech processing lines with these sights that attach to quick-clamp fittings for fast installation and easy removal for cleaning.

High-Vacuum Flanged Sights

Add a window to your high-vacuum system. With a pane of glass sealed inside a high-vacuum CF flange, these sights bolt onto vacuum chambers, tee fittings, and manifolds.

High-Vacuum Sights for Quick-Clamp Fittings

Designed with quick-clamp (KF) connections, these sights connect to a port on a high-vacuum chamber, so you can monitor what's happening inside.

Liquid-Level Indicators

High-Pressure Oil-Level Indicators

Monitor hydraulic fluid or oil level in pressurized applications, such as hydraulic systems where overflow is a concern.

Easy-View High-Pressure Oil-Level Indicators

The nylon body and window make these indicators shatter resistant.

Oil-Level Indicators

Monitor hydraulic fluid or oil level in gear boxes, crank cases, and other reservoirs.

Easy-View Oil-Level Indicators

Made with clear, shatter-resistant plastic, these indicators don't require a shield to protect them like other oil-level indicators, so you can check your hydraulic fluid or oil level from any angle.

Flexible Easy-View Liquid-Level Indicators

Bend these flexible indicators around the contours of your hydraulic fluid, oil, or water tank. Because their plastic resists shattering, they don’t need a protective shield like other liquid-level indicators, so you can check your tank’s level from any angle.

Chemical-Level Indicators

Check the level of liquids containing chemicals such as alcohol-based solutions, boric acid, and sodium bicarbonate.

Oil-Level and Temperature Indicators

Simultaneously monitor the hydraulic fluid or oil level and temperature in gear boxes, crank cases, and other reservoirs.

Shatter-Resistant Oil-Level and Temperature Indicators

The nylon body and window make these indicators shatter resistant.

High-Pressure Oil-Level and Temperature Indicators

Check both the temperature and the hydraulic fluid or oil level in a pressurized system.

Build-Your-Own Level Indicators with Shut-Off Valve

Combine a pair of valves with a gauge glass and four guard rods to build a complete level indicator.