Brass Quick Connect Pipe Fittings 2–5mm No-Weld Flare Nuts

Brass Quick Connect Straight Pipe Extension Fittings — 2, 3, 4 & 5mm

Upgrade your plumbing or fluid-line projects with these precision-made brass quick connector straight pipe fittings. Available in 2mm, 3mm, 4mm, and 5mm sizes, these no-weld plug-style connectors with flare nuts make pipe extensions fast, secure, and leak-resistant — no soldering or special tools required. Perfect for DIY enthusiasts, hobbyists, and professionals working on small-bore tubing applications.

Key Features

• No-Weld Design: Simple push-and-lock connection saves time and effort — no soldering or welding needed.
• Brass Construction: Made from high-quality brass for excellent durability, corrosion resistance, and longevity.
• Multiple Sizes: Available in 2mm, 3mm, 4mm, and 5mm to suit a wide range of small-bore tubing needs.
• Flare Nut Included: Each connector comes with a matching flare nut for a secure, tight seal.
• Rated for ≤850 kPa: Engineered to handle working pressures up to 850 kPa, suitable for low-to-medium pressure lines.
• Male Plug Type: Straight, male-connection design for easy in-line pipe extension.
• Brand New & High Quality: 100% new components, individually packaged (1 piece per pack).

Specifications

Common Applications

• Small-bore plumbing repairs and extensions
• Aquarium tubing and water feature connections
• Pneumatic and low-pressure fluid line connections
• Model building and RC hobby projects
• Laboratory and DIY fluid systems

Please Note: Due to manual measurement, a tolerance of approximately ±0.5mm may exist. Minor color variation from product images may occur due to lighting differences.

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For general guidance on safe plumbing practices and pipe fitting standards, visit the U.S. Consumer Product Safety Commission (CPSC).

Learn more: National pipe thread

Frequently Asked Questions

Q: What sizes are available for these brass quick connect pipe fittings?

A: These brass straight pipe connectors are available in four sizes: 2mm, 3mm, 4mm, and 5mm. Each listing is sold as 1 piece, so please select the size that matches your tubing diameter before purchasing.

Q: Do these no-weld fittings require any special tools to install?

A: No special tools are required. The quick-connect, plug-type design allows for hand-tightening with the included flare nut, making installation fast and straightforward without welding or soldering equipment.

Q: What is the maximum pressure rating for these brass pipe fittings?

A: These connectors are rated for working pressures of up to 850 kPa (approximately 123 PSI), making them suitable for low-to-medium pressure plumbing, aquarium, and hobby fluid-line applications.

Q: Are these fittings compatible with copper or plastic tubing?

A: These brass quick connectors are primarily designed for small-bore metal tubing. Compatibility with plastic tubing depends on the tubing's outer diameter and wall thickness. We recommend verifying your tubing specifications against the fitting size before purchase.