Instrument Tube Fittings
EC-79 certified 6D series and 20D series tube fittings
Assembly Fitting

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Tube Fitting 6D Series

Tube Fitting 6D Series Double Ferrule provide reliable, leak-tight connections with easy assembly and available in various shapes for example union straights, elbows, tees, crosses. Materials is available 316 stainless steel, alloy, brass, duplex stainless steel) with the sizes from 1/16″ to 2″ or 2-50 mm. Fittings reduce installation time and maintenance costs while improving system reliability and extending operational lifespan. The maximum working pressures of the tube ends at ambient temperature are determined by the maximum working pressure of the FITOK Tubing that is used.

FITOK tube fittings are EC-79 certified and have passed ASTM F1387 tests. They have undergone extensive testing, including exposure to repeated demanding external forces, environmental changes, and multiple cycles of assembly and disassembly. These rigorous tests confirm that FITOK tube fittings maintain leak-tight performance and exhibit exceptional product quality, ensuring reliable operation in harsh conditions.

Tube Fitting Features

  • Sizes range from 1/16″ to ” and 2 mm to 50 mm
  • Available for diverse materials and configurations
  • Precision machine components ensure perfect deformation of the ferrules and tubing for design
  • Hardened threads with smooth surface finish avoid galling and help to extend the fitting service life
  • Female nut threads are silver-plate to reduce the friction against the body threads
  • Radius junction design for elbows provides smooth flow path
  • Every fitting is mark with size, material and heat number
  • Fittings are easy to disconnect and re-tighten

Technical Data

  • NPT Threads (NPT)
  • Comply with ASME B1.20.1, SAE AS71051
  • ISO Tapered Threads (R, R1, R2, RC, RT, PT, BSPT, ZG)
  • Comply with ISO 7-1, EN 10226-1, BS 21, DIN 2999, JIS B0203.
  • Thread ISO Parallel Threads (G, RP, PF, BSPP)
  • Type is Comply with ISO 228-1, DIN ISO 228-1, JIS B0202, BS 2779.
  • SAE/MS Threads (UN, UNJ) Straight
  • Comply with ASME B1.1, ISO R725
More Information

Furnish in a variety of Configurations and materials so that a wide range of corrosive fluids and hostile environments can be handled with readily available parts. available as the integral end of a wide variety of hand- or remotely-operated valves ranging from 1/16 in.

Please click the page on the side below to view the data sheet for tube fittings  

FITOK ferrule is treated with high level hardening process, both the hardness and the corrosion resistance are strengthened.

Tube Fitting
Tube Fitting

Process            : Low temperature carbonization for the whole ferrule Thickness of coating : 25~30μm
Hardness          : HV0.2 800~1000
Salt spray test   : 600h no rust
Magnetism       : No
Hardened threads with smooth surface finish avoid galling and help to extend the fitting service life