Double Ferrule Compression Tube Fittings consist of four hydraulic components:

Fittings body, nut, front ferrule & back ferrule.

QC Hydraulics compression tube fittings is a two-ferrule design to ensure leak-free performance in high pressure instrumentation applications. Our fittings are designed and manufactured to compatible with Swagelok, SSP & Fitok.

Specifications Of Tube Fittings:

Working Pressure: 6,000 PSI

Working Temperature: -325 to 1200°F

Fractional Sizes: 1/16”-2”

Metric Sizes: 4mm- 25mm

Thread connection: NPT, JIC/AN, ISO/BSP, SAE/MS, ORFS, ORB, Weld, Tube Stub, Port Connectors

Shapes: Male and female connectors, adapters, reducers, unions, elbows, tees, crosses, caps, plugs, and bulkhead fittings:

Features Of Compression Tube Fittings:

  • Live-Loaded, two-ferrule designs
  • Easy to install
  • No torque is transmitted to tubing during installation


  • Two-Ferrule, Mechanical Grip Design
  • The two ferrules separate sealing and tube gripping
  • functions; each ferrule is optimized for its function

The front ferrule creates a seal:

  • against the fitting body
  • on the tubing outside diameter
  • As the nut is turned, the back ferrule:
  • axially advances the front ferrule
  • radially applies an effective tube grip

Applications of Tube Fittings:

  • Aerospace
  • Defense
  • Power Generation
  • Chemical Processing
  • Oil & Gas
  • Petrochemical
  • Alternative Fuels
  • Shipping Building
  • Medical Equipment

Please download our latest catalog for more products.