Copper Flare Gasket 3/8 in 45 Degree 12-Pack - Durable Sealing

Our review looks at the uxcell copper flare gasket 12-pack designed for 3/8 in tube fittings and 45 degree flare connections. The bottom line: this is a simple, durable sealing solution for technicians and DIYers who need reliable metal-to-metal seals on air conditioning, refrigeration, gas, or hydraulic lines. The gaskets are notable for being made of copper, which offers hardness, ductility, and corrosion resistance so that fittings maintain a leak-tight joint without frequent replacement.

Key Features

• Copper construction: The copper material gives wear resistance and hardness so gaskets maintain shape under repeated tightening.
• 3/8 in tube size: Sized for 3/8 in (9.52 mm) copper pipe with a 9 mm inner diameter for consistent fitting compatibility.
• 45 degree flare design: Shaped for 45 degree flare fittings to produce reliable metal-to-metal seals on AC and refrigeration lines.
• Wide compatibility: Works with brass, aluminum, chopper, and welded steel hydraulic tubing that can be flared, increasing its usefulness across systems.
• 12 pieces per pack: A dozen gaskets provides spare parts for routine maintenance and small installation jobs without frequent reordering.

Who It's For

This product is aimed at HVAC and refrigeration technicians, mechanics, and informed DIYers who regularly work with flared copper tubing and need a dependable seal that resists corrosion and deformation. It is especially appropriate when a metal-to-metal seal is preferred over softer sealing materials for higher temperature or pressure systems.

Those who should look elsewhere include people who have non-flared fittings, fittings of a different flare angle, or require metric-only specifications that do not map to the 3/8 in (9.52 mm) size; always confirm tube and fitting dimensions before purchase.

Pros & Cons

Pros

• Durable copper material resists wear and deformation for long service life.
• Specifically sized for 3/8 in (9.52 mm) tubing to reduce fitment guesswork when dimensions match.
• Compatible with common flared tubing materials like brass and aluminum for flexible use.
• Pack of 12 provides spares for maintenance and small projects.

Cons

• Only suitable for 45 degree flare fittings and the specified 3/8 in size, so incorrect sizing will cause fitment issues.

Specifications

Material	Copper
Tube size	3/8 in (9.52 mm)
Inner diameter	9 mm (0.38 in)
Outside diameter	14 mm (0.55 in)
Flare angle	45 degree
Package contents	12 PCS copper flare gasket

Our Verdict

The uxcell copper flare gasket pack is a practical, cost-effective choice for anyone working with 3/8 in 45 degree flared tubing in air conditioning, refrigeration, gas, or hydraulic systems. Its copper construction and 12-piece count deliver good durability and value for maintenance tasks, provided buyers confirm the flare angle and tube size before ordering.

Frequently Asked Questions

Will these gaskets work on brass fittings?
Yes, they are compatible with brass, as well as aluminum and welded steel tubing that can be flared.

Are these suitable for any flare angle?
No, these are designed specifically for 45 degree flare fittings and will not seal correctly on other flare angles.

How many gaskets come in a pack?
The product includes 12 copper flare gaskets per pack for spare parts or multiple connections.