Ralston Fittings and Adapters

Ralston Fittings and Adapters

Ralston Instruments Fittings and AdaptersRalston Instruments 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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Showing 1-25 of 248
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  1. Ralston Instruments QTHA-7SS0 7/16-20 Male SAE/MS x Male Quick-test, Stainless Steel Adapter
    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 $73.14
    7/16-20 Male SAE/MS x Male Quick-test,SS Learn More
  2. Ralston Instruments SWIV-2FBW 1/4" Female NPT swivel, Brass
    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
    $25.17
    1/4" Female NPT swivel, brass Learn More
  3. Ralston Instruments QTHA-3SB1 Male Quick-test with Check Valve, Brass
    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
    $26.71
    Male Quick-test with Check Valve, Brass Learn More
  4. Ralston Instruments QTHA-2FB1 1/4" Female NPT x Male QT with Check- valve, Brass Adapter
    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 $32.47
    1/4"Female NPTx MaleQT w/Check- valve,Brass Learn More
  5. Ralston Instruments QTHA-HHSB
    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
    $63.14
    Male Quick-test x male Quick-test bulkhead union, S.S Learn More
  6. Ralston Instruments QTFT-4MB1 1/2" male NPT x male Quick-test with check-valve Adapter
    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
    $59.92
    1/2" male NPT x male Quick-test with check-valve Learn More
  7. Ralston Instruments QTFT-2MB0-RS G 1/4" male BSPP (ISO 228/1) x male QT Adapter
    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 $60.82
    G 1/4" male BSPP (ISO 228/1) x male QT Learn More
  8. Ralston Instruments XTHA-HHSU Quick-test XT 10000PSI Hose Union, Stainless Steel
    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 $80.84
    Quick-test XT 10,000PSI,Hose Union,SS Learn More
  9. Ralston Instruments QTHA-1FS0 1/8" female NPT x male QT, no check-valve, Stainless Steel Adapter
    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
    $62.62
    1/8" female NPT x male QT, no check-valve, S.S. Learn More
  10. Ralston Instruments QTHA-3FS0 3/8" female NPT x male Quick-test, no check-valve, Stainless Steel Adapter
    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
    $85.61
    3/8" female NPT x male Quick-test, no check-valve,S.S Learn More
  11. Ralston XTFT-HNS0 1/4"-28 UNF DP Transmitter x Male Fitting
    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
    $157.15
    1/4"-28 UNF DP Transmitter x Male QT XT Fitting w/Cap &Chain Learn More
  12. Ralston Instruments QTFT-PLGS SS Quick-test Hose Plug & Chain only
    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 $47.63
    SS Quick-test Hose Plug & Chain only Learn More
  13. Ralston Instruments QTHA-2FBA-RG G 1/4" Female BSPP (ISO 228/1) x Female QT, no check valve, Brass Adapter
    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
    $53.87
    G 1/4"Female BSPP(ISO 228/1) x Female QT,no check valve,,Brass Learn More
  14. Ralston Instruments QTHA-3S2F 1/4" Female NPT, Brass Adapter
    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 $26.94
    1/4" Female NPT, brass Learn More
  15. Ralston Instruments XTHA-1MS0 1/8" Male NPT x Male XT, no check-valve, Stainless Steel Adapter
    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 $96.14
    1/8"Male NPTxMale XT,no check- valve,SS Learn More
  16. Ralston Instruments QTHA-4MB1 1/2" Male NPT x Male QT with Check- valve, Brass Adapter
    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
    $42.67
    1/2"Male NPT x Male QT w/Check- valve, Brass Learn More
  17. Ralston QTHA-EHS0 DP Transmittter Adapter M8 x 1.25 bleed plugs, S.S
    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
    $83.10
    DP Transmittter Adapter M8x1.25 bleed plugs, S.S Learn More
  18. Clearance
    Ralston Instruments QTHA-3MB1 3/8" Male NPT x Male QT with Check- valve, Brass Adapter
    Ralston 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 $46.19
    3/8"Male NPTxMale QT w/Check- valve, Brass Learn More
  19. Clearance
    Ralston Instruments QTHA-1MS1 1/8" MNPTx male QT with Check-valve Stainless Steel Adapter
    Ralston 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 $60.96
    1/8"MNPTx male QT w/Check-valve SS Learn More
  20. Ralston Instruments QTFT-4MS0 1/2" Male NPT x Male QT, no check valve with Cap & Chain Adapter
    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
    $92.76
    1/2"Male NPT x Male QT,no check valve w/Cap & Chain Learn More
  21. Ralston Instruments QTHA-2FB0-RG G 1/4" female BSPP (ISO 228/1) x male QT, no check-valve, Brass Adapter
    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
    $35.04
    G 1/4" female BSPP (ISO 228/1)x male QT, no check-valve, brass Learn More
  22. Ralston Instruments QTHA-4FSA-QD 1/2" FNPT x Quick Disconnect x Male QT, Stainless Steel, no check valve Adapter
    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
    $167.10
    1/2"FNPT x Quick Disconnect x Male QT,SS,no check valve Learn More
  23. Ralston Instruments QTHA-1FS0-QD
    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
    $94.82
    1/8"Female NPT Quick-connect x Male Quick-test,no Check-valve Learn More
  24. Ralston Instruments QTHA-1MB0-RS 1/8" Male BSPP (ISO 228/1) x Male QT, no Check valve, Brass Adapter
    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
    $27.16
    1/8"Male BSPP(ISO 228/1)x Male QT, no Check valve,Brass Learn More
  25. Ralston Instruments QTHA-3MS0 3/8" Male NPT Male Quick-test Stainless Steel Adapter
    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 $59.42
    3/8" Male NPT Male Quick-test SS Learn More
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