Tube x Male Superthread Coupling

Useful Information

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Key Features / Tech Specs:

  • Manufactured by John Guest
  • Material: Brass body, Acetal collet, Polyurethane seal
  • Metric tube x Superthread miniature coupling
  • Pressure rated to 16 bar
  • Maximum temperature: 65°C

Useful Info:

These miniature couplings have a push-in tube end suited to tubing with a 4mm outer diameter while the threaded end is 1/8" in diameter.

The threaded ends of these brass fittings are designed to be hand tightened and have a maximum torque value of 6.0Nm. They have a Superthread end allowing them to be used in conjunction with BSPP, BSPT, NPT, PT and PF fittings. The thread includes a polyurethane seal to ensure an airtight joint is produced without any possibility of the tape seal entering and contaminating the system.

Tube inserts must be used with pneumatic applications where pressures are in excess of 10 bar; you should not exceed 16 bar. Suitable for use with Polyethylene, Polyurethane, Nylon tubing as well as soft metal tubings such as copper or mild steel.


If you require any further information then don’t hesitate to ring us here at Pipestock on 0845 634 1053. We’re always happy to help!

Grouped product items
CodeProduct NameList PriceYou SaveYou Pay Quantity
381641JG Miniature Brass Straight Adaptor x Male ST 4mm x 1/8" £2.60 30% £1.82