Instrumentation Union

Instrumentation Union

Part Number 2-DU
Material 316 Stainless Steel
Tube OD 1/8" x 1/8"
Temperature Range -325°F to 1200°F (-198°C to 648°C)
Weight Lb 0.0500


  • Applications include: high pressure, high temperature, nitrogen, helium, flammable gases, hydraulic gases, corrosive media and pneumatic automation.


  • ASTM F 1387 Certified


  • Double collet (ferrule) swaging action
  • Two positive seal points


  • ASTM material construction
  • 316 stainless steel

Compatibility & Interchange Data

  • Fully interchangeable with Swagelok® and Parker A-Lok® fittings


  • Cut tubing squarely and clean tube end thoroughly to remove burrs.
  • Insert tubing into the assembly making sure the tubing seats firm against the shoulder of the body and the nut is finger tight.
  • Tighten the nut with a wrench 1-1/4 turns, while holding the body with a second wrench.


  • Instrumentation fittings come completely assembled.

Safety notes

  • Never connect, disconnect or remake a fitting with pressure in the system.
  • Make sure all fittings are properly installed.
  • It is not recommended to go beyond the pressure rating of the tubing. Elongation could occur in the tubing, shrinking the wall thickness and cause potential harm.
  • For proper sealing it is recommended that the tubing and fittings be of like material.
  • Always use proper thread lubricant and sealants on tapered pipe threads.
  • Never bleed a system by loosening a fitting.


Related Products


Stock Availability