The Ralston Instruments QTHA-2TB0 is a male Quick-Test x 1/4" female tube fitting pressure calibration adapter.
The QTHA-2TB0 adapter is compatible with most tube fitting brands including Swagelok, Parker, Gyrolok, Tylok, Hoke, SSP, etc.
A finger-tight O-ring seal provides fast and reliable leak-free connections to 345 bar / 5,000psi without tools or thread tape.
The QTHA-2TB0 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.

Choose the appropriate tube fitting adapter for your application

Industrial Applications of Ralston Tube Fitting Quick-Test Adapters

Ralston tube fitting adapters can be used across a wide range of applications including gas sampling, pressure calibration, pressure reading and testing.
With high-quality products, Ralston 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

• Easy to connect, tighten and disconnect without a wrench
• An integrated O-ring seal requires only hand tightening
• All Ralston Quick-Test adapters provide dependable pressure-tight, leak-free sealing
• Self-venting for increased protection and safe disconnection under pressure
• Available in a range of imperial / fractional and metric sizes
• Integrated locking mechanism aids in 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

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.

Beyond tube fittings, a comprehensive range of interchangeable Ralston Quick-Test adapters and Quick-Test hoses provide connections for almost any pressure testing application.