SMC KQ2U Series, KQ2U04-00A Pneumatic Fitting, Brass, Polybutylene Terephthalate, Stainless Steel (Internal) Grey,

SMC KQ2U Series Pneumatic Fitting, 4mm Connection Size A, 4mm Connection Size B - KQ2U04-00A

This pneumatic fitting is a push-in one-touch connector designed for connecting pneumatic tubing in metric‑threaded systems. It joins two push-in connections to enable quick assembly and disassembly of Air lines while operating within typical industrial temperature ranges. The construction combines metallic and polymer components to balance durability and ease of handling.

Features and Benefits:

• Maximum operating pressure 1 MPa for robust system performance
  Operates between -5°C and 60°C for varied ambient environments
  Stainless steel internal parts reduce wear in moving components
  Brass and PBT materials combine corrosion resistance and light weight
  Push-in connection on both ends for Rapid tube insertion

Applications

• Suitable for compressed-air distribution in manufacturing plants
  Ideal for automated pick-and-place pneumatic circuits
  Used with metric‑threaded manifolds and fittings
  Can be used for maintenance of pneumatic control panels
  Suitable for colour‑coded assemblies using grey white brass finishes

What sealing approach is used for quick tube connections?

One-touch push-in ends employ internal grips and Seals to retain tubing under pressure while allowing release by hand.

Which materials contact the media and which provide external finish?

Internal wet‑path components include stainless steel and brass while external body surfaces use polybutylene terephthalate and metal finishes.

How does temperature range affect installation choices?

Installers should consider the specified -5°C to 60°C window when selecting nearby components and sealing materials to avoid thermal mismatch.

Is the fitting suitable where restricted materials policies apply?

The product carries RoHS compliance indicating absence of certain restricted substances.