The Ralston Instruments QTHA-4TB0 is a male Quick-Test x 1/2" female tube fitting pressure calibration adapter.
The QTHA-4TB0 adapter is compatible with most tube fitting brands including Swagelok, Parker, Gyrolok, Tylok, Hoke, SSP, etc.

Once installed, the QTHA-4TB0 allows you to directly attach a finger-tight, self-venting Ralston Quick-Test hose for pressure testing, calibrating or sampling.
An integrated O-ring seal provides secure and reliable, leak-free connections to 345 bar / 5,000psi without tools or thread tape.
Soild brass construction resists corrosion, tough conditions and everyday wear and tear.
The QTHA-4TB0 is part of Ralston's Quick-Test system of pressure hoses and adapters, which offers a universal range of direct connections to virtually any device.

Ralston Tube Fitting Quick-Test Adapters
Connecting to tube fittings with a wrench takes time, and repeated tightening can damage fittings and cause leaks.
Ralston Quick-Test adapters connect in seconds using only your fingers, creating a gas-tight, leak-free seal without tools or thread tape.
Compatible with most major tube fitting brands, Ralston adapters improve efficiency and consistency in the field across pressure calibration and testing applications.
Ralston tube fitting Quick-Test adapters come in a variety of configurations including imperial / fractional and metric sizes, with brass or stainless steel options.

Ralston tube fitting adapters are quick and easy to use.
Simply remove the tube ferrules and nuts, and connect by hand. 
When connected, the adapter creates a gas-tight seal without the need for a wrench.
Hand tightening is enough to create a strong, reliable connection.
Ralston's tube adapters help save time in hydrostatic testing, pressure calibration or pressure safety valve (PSV) testing operations.

Alternative Ralston Male Quick-Test x 1/2" Tube Adapters
QTHA-4TS0 stainless steel adapter suits aggressive media or harsh applications.
Find the correct tube fitting adapter for your application.
If you need to connect to a diverse range of fittings, Transtek's pressure calibration hose and adapter kits cover most options and help simplify your work.

Suitable Applications for Ralston Quick-Test Adapters
Ralston adapters can be used across a wide variety of industrial or laboratory applications including gas sampling, pressure calibration, pressure reading and testing.
Ralston's high quality products strive to address critical issues such as vibration, air-tight sealing, corrosion, thermal shock, installation and compliance with industry standards.

Advantages of Ralston Tube Fitting Quick-Test Adapters
Ralston's comprehensive range of interchangeable Quick-Test adapters and Quick-Test hoses provide connections for almost any pressure testing application.

• Quick-Test adapters and hoses connect, tighten and disconnect without a wrench
• Pressure-tight, leak-free, O-ring seals require only hand tightening
• Self-venting mechanisms allow safe disconnection under pressure
• Available in a range of imperial / fractional and metric sizes
• Integrated locking mechanisms provide maximum grip with minimal deformation of the tube adapter
• Able to withstand vibration fatigue and thermal shock, providing superior tube support
• 100% brass or stainless steel test construction resists corrosion and heavy-duty use
• Compatible with most industry-rated tube fittings
  
• Compatible with all major pressure media, applications and connection standards