1/4ft Brass Flare Nut 10pcs SAE 45 Degree Copper Flared Tube Fitting

In this review of the PATIKIL 1/4' Brass Flare Nut set, the bottom line is simple: these fittings are aimed at DIYers and HVAC technicians who need a compact, reusable flare nut that reliably seals fuel, oil, gas and air lines. The reviewer found the brass construction and precise 7/16'-20 UNF thread fit deliver a dependable, vibration-resistant connection for mini split air conditioners and other small plumbing jobs. The included tape is noted as an accessory only; the flare itself is designed to seal without tape and holds up across a wide temperature range.

Key Features

• Brass construction: Resists rust and corrosion so fittings maintain integrity in HVAC and plumbing environments.
• 1/4' fit with 7/16'-20 UNF thread: Matches standard 1/4' copper tubing for a tight, compatible connection.
• Reusable design: Easy to install and remove, allowing reuse for maintenance or modifications without replacing hardware.
• Temperature range: Rated from -53 Celsius to 100 Celsius, suitable for many refrigeration and water line applications.
• Compact dimensions: Low 13mm height and 16mm hex width make these nuts practical where space is limited.
• Leak-resistant seal: The 45 degree flare and precise inner hole diameter create a secure seal under pressure and vibration.

Who It's For

This set is best for homeowners doing air conditioner or small plumbing repairs, and for HVAC or refrigeration technicians who need a small quantity of reliable flare nuts for installations and maintenance. The pack of 10 suits projects that require multiple connections, and the compatibility with copper, aluminum, brass, and welded steel tubing makes it versatile.

Those who need high-volume industrial fittings or specialized metric thread sizes should look elsewhere; this product is a standard SAE 45 degree flare nut intended for 1/4' outer diameter tubing and UNF thread systems rather than metric or large-diameter pipework.

Pros & Cons

Pros

• Durable brass material resists corrosion and vibration, extending service life.
• Precise thread and inner dimensions make for a reliable, leak-resistant seal on 1/4' flared tubing.
• Compact size and hex width allow use in tight spaces common in HVAC units and mini split installations.
• Reusable and easy to install, saving time during repairs and adjustments.

Cons

• Not intended for metric-threaded systems or larger tubing; confined to 1/4' SAE applications.
• The included tape is an auxiliary item and should not be used as a substitute for proper flare sealing.

Specifications

Brand	PATIKIL
Material	Brass
Thread specification	1/4' female flare (7/16'-20 UNF thread)
Fits tubing outer diameter	1/4' (6.35mm)
Height	13mm (0.51 in)
Hex width	16mm (0.63 in)
Temperature range	-53 Celsius to 100 Celsius

Our Verdict

The PATIKIL 1/4' brass flare nuts are a practical, good-value choice for HVAC work and small plumbing repairs where a durable, reusable flare fitting is required. They deliver a secure seal on 1/4' copper and similar tubing and stand up to vibration and temperature variation, making them a sensible purchase for technicians and DIYers who need reliable, compact fittings.

Frequently Asked Questions

Can these be used on copper mini split refrigerant lines?
Yes. They are designed to fit 1/4' copper tubing and create a 45 degree flare seal suitable for mini split and similar HVAC lines.

Is the supplied tape required for installation?
No. The tape is provided as an accessory for other plumbing tasks; the flare nut is intended to seal via the flared joint without tape.

Are these compatible with steel or aluminum tubing?
They work with aluminum, copper, brass, and welded steel tubing that can be flared, as long as the tubing outer diameter is 1/4'.