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Ten brass push-fit adapters with 12 mm tube and half-inch BSPP threads

Legris

Legris 3101 12 21 Push-Fit Adapter Trap 1/2 in 12 mm Brass 10 Pack

SKU CH-4RFS-QBNPW MPN 3101

Push-fit brass adapter connects 12 mm tubing to 1/2 in BSPP threads at up to 290 psi and 175 °F, supplied in a pack of ten

  • TypeDrain Components
  • Push-to-connect design speeds installation without tools
  • Brass construction resists corrosion for long service life
  • 290 psi rating handles demanding pneumatic lines
  • 175 °F maximum temperature suits high-heat environments
  • Ten-piece pack provides multiple fittings per order

Push-Fit Brass Adapters for 12 mm Tubing

This pack contains ten Legris 3101 12 21 push-fit adapters designed to connect 12 mm outer diameter tubing to a 1/2 inch MBSPP thread. The brass construction suits vacuum applications and general fluid handling where a reliable seal is required. Each fitting features a push-to-connect end for quick assembly without tools.

Simple Push-to-Connect Installation

Installation is completed by pushing the tube firmly into the fitting until it seats against the internal grip ring and O-ring. No thread sealant is included on the 1/2 inch MBSPP side, so appropriate sealant or tape must be applied during thread engagement. A common issue is insufficient tube insertion depth, which prevents the collet from locking and leads to leaks under pressure.

Rated for 290 psi and 175 Degrees F

The adapters are rated for a maximum operating pressure of 290 psi and a maximum operating temperature of 175 degrees F, providing headroom for typical pneumatic and vacuum systems. They are not suited for applications exceeding these limits or for aggressive chemical media incompatible with brass. The 22 1/2 mm overall length fits standard installations but offers no extra reach for recessed ports.

Highlights

  • Push-to-connect design speeds installation without tools
  • Brass construction resists corrosion for long service life
  • 290 psi rating handles demanding pneumatic lines
  • 175 °F maximum temperature suits high-heat environments
  • Ten-piece pack provides multiple fittings per order

Specifications

TypeDrain Components
BrandLegris
Model3101 12 21

Questions about this item

How can I confirm the push-fit connection is sealing correctly at 290 psi after installation?

Pressurise the system up to the 290 psi maximum operating pressure and inspect each 12 mm tube joint and the 1/2 in MBSPP thread for leaks; a bubble test or pressure-drop check over several minutes will verify the seal.

The pack contains ten brass adapters; are sealing washers or thread tape included or must they be purchased separately?

The supplier description states pre-applied thread sealant is not included, so PTFE tape or a compatible thread sealant should be bought separately for the 1/2 in BSPP side; the push-fit end seals internally without extra parts.

My application runs at 175 °F — is the brass 3101 12 21 rated for continuous use at that temperature?

Yes, the maximum operating temperature is specified as 175 °F, so the adapter is designed for continuous service at that limit provided pressure does not exceed 290 psi.

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