TRILINK QT0 Push-to-Connect Fittings, 3/8" OD x 3/8" NPT, 20-Piece Kit

Some pneumatic setups need a mix of fitting shapes, while others call for a specific connector size. This TRILINK QT0 kit combines straight and elbow push-to-connect fittings for air-line connections with matching dimensions.

The tube port is for 3/8-inch-OD tubing, and the threaded end is 3/8-inch NPT male. The assortment contains 12 straight fittings and 8 elbow fittings.

Would that mix work for your layout? It gives you two connection styles without changing the specified tube and thread sizes.

Tips for day-to-day use

Push-to-connect fittings are intended to let you insert tubing and remove it by pressing the release ring. For a workshop compressor line, that can be useful when routing tubing around tools or choosing between a straight run and an angled connection. The listing names PA (nylon), PE, PU, and PVC tubing as compatible materials, the tubing still needs to match the 3/8-inch outer-diameter port.

The threaded side is 3/8-inch NPT male, so check that the receiving port uses the corresponding thread type and size before planning the connection. The manufacturer also describes a swivel cap that rotates 360° to help align tubing in tight or angled spaces. Maximum pressure is listed as 145 PSI (10 bar), with an operating temperature range of -22°F to 140°F (-30°C to 60°C). These figures help define the stated operating range, but the listing does not specify a pressure rating for every possible tubing or system combination.

Specifications

• Type: Push-to-connect pneumatic fittings
• Format: 20-piece assortment, 12 straight and 8 elbow fittings
• Compatibility: 3/8-inch-OD tubing, 3/8-inch NPT male threaded end, listed for PA (nylon), PE, PU, and PVC tubing
• Material: The listing describes nickel-plated brass and also specifies a PBT body with nickel-plated brass threaded ends
• What’s included: Push-to-connect fittings
• Reference: QT0

What stands out

The practical distinction is the assortment: straight connectors suit direct runs, while elbow fittings give another routing option where the tubing needs to turn. That can make the set more useful for a mixed layout than buying only one fitting shape, provided both styles suit the installation. The 12-to-8 split favors straight fittings, so the count is worth considering if your setup needs mostly elbows.

TRILINK identifies the fittings for compressor lines, air tools, pneumatic systems, automotive applications, and DIY air setups. The push-to-connect design avoids a separate tool for inserting the tube, according to the product details. Rather than treating the kit as a universal air-line solution, match the port size, thread, tubing material, and operating conditions to the connection you are making.

When it makes sense

It suits you if you need both straight and elbow fittings for a pneumatic setup built around 3/8-inch-OD tubing and 3/8-inch NPT ports. The stated tubing options and pressure and temperature ranges may also help you compare the kit with buying individual fittings for a specific layout.

You may want to skip it if your tubing or threaded ports use different dimensions or a different thread type, those connections are not what this kit is specified for. If your layout calls for a different straight-to-elbow mix, the fixed assortment may also be less suitable than selecting fittings individually.