Ralston Fittings and Adapters
Precision Fittings and Adapters for Reliable Pressure Testing and Calibration
Ralston Instruments Fittings and Adapters, available through Transcat, offer industry-leading precision and durability for professionals working with pressure systems. Designed to ensure leak-free connections in even the most demanding applications, these fittings and adapters are essential tools for technicians performing pressure calibration, testing, and fluid transfer. With a wide range of configurations and materials, Ralston’s fittings and adapters provide seamless compatibility with gas, hydraulic, and pneumatic systems across various industries.
Leak-Free Performance
Ralston’s fittings and adapters are engineered for tight, secure, and reliable connections, eliminating the risk of leaks that can compromise accuracy during pressure testing or calibration. Each component undergoes rigorous testing to ensure consistent performance in critical applications.
Durable, Corrosion-Resistant Materials
Constructed from high-grade stainless steel, brass, and other corrosion-resistant materials, Ralston fittings and adapters are built for longevity, even in harsh environments. These materials ensure resistance to wear, corrosion, and impact, extending the life of your equipment.
High-Pressure Tolerance
Ralston fittings and adapters are designed to handle both low-pressure and high-pressure environments, making them suitable for everything from routine calibration to high-stakes testing in gas and fluid systems. They are built to withstand pressure levels up to 5000 PSI and beyond, ensuring they meet the toughest requirements.
Wide Range of Configurations
Available in a broad spectrum of sizes, thread types, and connection styles—including NPT, BSPP, and Quick-Test™—Ralston fittings and adapters are compatible with virtually any system. This versatility makes them ideal for a variety of industries, including energy, aerospace, and industrial manufacturing.
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Ralston Instruments QTHA-7SS0 7/16-20 Male SAE/MS x Male Quick-test, Stainless Steel Adapter 7/16-20 Male SAE/MS x Male Quick-test,SS
Order #: QTHA-7SS0 Mfg #: QTHA-7SS0 Availability: In stock Special Price $73.13 Regular Price $73.147/16-20 Male SAE/MS x Male Quick-test,SS Learn More -
Ralston Instruments SWIV-2FBW 1/4" Female NPT swivel, Brass 1/4" Female NPT swivel, brass
Order #: SWIV-2FBW Mfg #: SWIV-2FBW Availability: In stock $25.171/4" Female NPT swivel, brass Learn More -
Ralston Instruments QTHA-3SB1 Male Quick-test with Check Valve, Brass Male Quick-test with Check Valve, Brass
Order #: QTHA-3SB1 Mfg #: QTHA-3SB1 Availability: In stock $26.71Male Quick-test with Check Valve, Brass Learn More -
Ralston Instruments QTHA-2FB1 1/4" Female NPT x Male QT with Check- valve, Brass Adapter 1/4"Female NPTx MaleQT w/Check- valve,Brass
Order #: QTHA-2FB1 Mfg #: QTHA-2FB1 Availability: In stock Special Price $32.46 Regular Price $32.471/4"Female NPTx MaleQT w/Check- valve,Brass Learn More -
Ralston Instruments QTHA-HHSB Male Quick-test x male Quick-test bulkhead union, Stainless Steel Male Quick-test x male Quick-test bulkhead union, S.S
Order #: QTHA-HHSB Mfg #: QTHA-HHSB Availability: In stock $63.14Male Quick-test x male Quick-test bulkhead union, S.S Learn More -
Ralston Instruments QTFT-4MB1 1/2" male NPT x male Quick-test with check-valve Adapter 1/2" male NPT x male Quick-test with check-valve
Order #: QTFT-4MB1 Mfg #: QTFT-4MB1 Availability: In stock $59.921/2" male NPT x male Quick-test with check-valve Learn More -
Ralston Instruments QTFT-2MB0-RS G 1/4" male BSPP (ISO 228/1) x male QT Adapter G 1/4" male BSPP (ISO 228/1) x male QT
Order #: QTFT-2MB0-RS Mfg #: QTFT-2MB0-RS Availability: In stock Special Price $60.81 Regular Price $60.82G 1/4" male BSPP (ISO 228/1) x male QT Learn More -
Ralston Instruments XTHA-HHSU Quick-test XT 10000PSI Hose Union, Stainless Steel Quick-test XT 10,000PSI,Hose Union,SS
Order #: XTHA-HHSU Mfg #: XTHA-HHSU Availability: In stock Special Price $80.83 Regular Price $80.84Quick-test XT 10,000PSI,Hose Union,SS Learn More -
Ralston Instruments QTHA-1FS0 1/8" female NPT x male QT, no check-valve, Stainless Steel Adapter 1/8" female NPT x male QT, no check-valve, S.S.
Order #: QTHA-1FS0 Mfg #: QTHA-1FS0 Availability: In stock $62.621/8" female NPT x male QT, no check-valve, S.S. Learn More -
Ralston Instruments QTHA-3FS0 3/8" female NPT x male Quick-test, no check-valve, Stainless Steel Adapter 3/8" female NPT x male Quick-test, no check-valve,S.S
Order #: QTHA-3FS0 Mfg #: QTHA-3FS0 Availability: In stock $85.613/8" female NPT x male Quick-test, no check-valve,S.S Learn More -
Ralston Instruments XTFT-HNS0 1/4" -28 UNF DP Transmitter x Male QT XT Fitting with Cap & Chain 1/4"-28 UNF DP Transmitter x Male QT XT Fitting w/Cap &Chain
Order #: XTFT-HNS0 Mfg #: XTFT-HNS0 Availability: In stock $157.151/4"-28 UNF DP Transmitter x Male QT XT Fitting w/Cap &Chain Learn More -
Ralston Instruments QTFT-PLGS Stainless Steel Quick-test Hose Plug & Chain only SS Quick-test Hose Plug & Chain only
Order #: QTFT-PLGS Mfg #: QTFT-PLGS Availability: In stock Special Price $47.62 Regular Price $47.63SS Quick-test Hose Plug & Chain only Learn More -
Ralston Instruments QTHA-2FBA-RG G 1/4" Female BSPP (ISO 228/1) x Female QT, no check valve, Brass Adapter G 1/4"Female BSPP(ISO 228/1) x Female QT,no check valve,,Brass
Order #: QTHA-2FBA-RG Mfg #: QTHA-2FBA-RG Availability: In stock $53.87G 1/4"Female BSPP(ISO 228/1) x Female QT,no check valve,,Brass Learn More -
Ralston Instruments QTHA-3S2F 1/4" Female NPT, Brass Adapter 1/4" Female NPT, brass
Order #: QTHA-3S2F Mfg #: QTHA-3S2F Availability: In stock Special Price $26.93 Regular Price $26.941/4" Female NPT, brass Learn More -
Ralston Instruments XTHA-1MS0 1/8" Male NPT x Male XT, no check-valve, Stainless Steel Adapter 1/8"Male NPTxMale XT,no check- valve,SS
Order #: XTHA-1MS0 Mfg #: XTHA-1MS0 Availability: In stock Special Price $96.13 Regular Price $96.141/8"Male NPTxMale XT,no check- valve,SS Learn More -
Ralston Instruments QTHA-4MB1 1/2" Male NPT x Male QT with Check- valve, Brass Adapter 1/2"Male NPT x Male QT w/Check- valve, Brass
Order #: QTHA-4MB1 Mfg #: QTHA-4MB1 Availability: In stock $42.671/2"Male NPT x Male QT w/Check- valve, Brass Learn More -
Ralston Instruments QTHA-EHS0 DP Transmittter Adapter M8 x 1.25 bleed plugs, Stainless Steel DP Transmittter Adapter M8x1.25 bleed plugs, S.S
Order #: QTHA-EHS0 Mfg #: QTHA-EHS0 Availability: In stock $83.10DP Transmittter Adapter M8x1.25 bleed plugs, S.S Learn More -
ClearanceRalston Instruments QTHA-3MB1 3/8" Male NPT x Male QT with Check- valve, Brass Adapter 3/8"Male NPTxMale QT w/Check- valve, Brass
Order #: QTHA-3MB1 Mfg #: QTHA-3MB1 Availability: In stock Special Price $23.05 Regular Price $46.193/8"Male NPTxMale QT w/Check- valve, Brass Learn More -
ClearanceRalston Instruments QTHA-1MS1 1/8" MNPTx male QT with Check-valve Stainless Steel Adapter 1/8"MNPTx male QT w/Check-valve SS
Order #: QTHA-1MS1 Mfg #: QTHA-1MS1 Availability: In stock Special Price $30.08 Regular Price $60.961/8"MNPTx male QT w/Check-valve SS Learn More -
Ralston Instruments QTFT-4MS0 1/2" Male NPT x Male QT, no check valve with Cap & Chain Adapter 1/2"Male NPT x Male QT,no check valve w/Cap & Chain
Order #: QTFT-4MS0 Mfg #: QTFT-4MS0 Availability: In stock $92.761/2"Male NPT x Male QT,no check valve w/Cap & Chain Learn More -
Ralston Instruments QTHA-2FB0-RG G 1/4" female BSPP (ISO 228/1) x male QT, no check-valve, Brass Adapter G 1/4" female BSPP (ISO 228/1)x male QT, no check-valve, brass
Order #: QTHA-2FB0-RG Mfg #: QTHA-2FB0-RG Availability: In stock $35.04G 1/4" female BSPP (ISO 228/1)x male QT, no check-valve, brass Learn More -
Ralston Instruments QTHA-4FSA-QD 1/2" FNPT x Quick Disconnect x Male QT, Stainless Steel, no check valve Adapter 1/2"FNPT x Quick Disconnect x Male QT,SS,no check valve
Order #: QTHA-4FSA-QD Mfg #: QTHA-4FSA-QD Availability: In stock $167.101/2"FNPT x Quick Disconnect x Male QT,SS,no check valve Learn More -
Ralston Instruments QTHA-1FS0-QD 1/8" Female NPT Quick-connect x Male Quick-test, no Check-valve Adapter 1/8"Female NPT Quick-connect x Male Quick-test,no Check-valve
Order #: QTHA-1FS0-QD Mfg #: QTHA-1FS0-QD Availability: In stock $94.821/8"Female NPT Quick-connect x Male Quick-test,no Check-valve Learn More -
Ralston Instruments QTHA-1MB0-RS 1/8" Male BSPP (ISO 228/1) x Male QT, no Check valve, Brass Adapter 1/8"Male BSPP(ISO 228/1)x Male QT, no Check valve,Brass
Order #: QTHA-1MB0-RS Mfg #: QTHA-1MB0-RS Availability: In stock $27.161/8"Male BSPP(ISO 228/1)x Male QT, no Check valve,Brass Learn More -
Ralston Instruments QTHA-3MS0 3/8" Male NPT Male Quick-test Stainless Steel Adapter 3/8" Male NPT Male Quick-test SS
Order #: QTHA-3MS0 Mfg #: QTHA-3MS0 Availability: In stock Special Price $59.41 Regular Price $59.423/8" Male NPT Male Quick-test SS Learn More