Flare-Nut Wrenches | McMaster-Carr

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107 Products

Wrenches and Sockets

Secure-Grip Open-End Wrenches

The opening shape makes more contact with fasteners for a better grip than standard open-end wrenches. These tools are also known as flare-nut or line wrenches.

Secure-Grip Open-End Wrench Sets

The opening shape makes more contact with fasteners for a better grip than standard open-end wrenches. These tools are also known as flare-nut or line wrenches.

Secure-Grip Wrench Heads

Grip more of your fastener head with these wrench heads.

Open-End 6-Point Sockets

Slide the open side of these sockets over a tube or hose to adjust a nut that’s already installed.

Snap-Open Ratcheting Box-End Wrench Head Sets

Get a strong grip in tight areas, even on fasteners that are rounded or damaged.

Secure-Grip Wrench Head Sets

Grip more of your fastener head with these wrench heads.

Open-End 6-Point Socket Sets

The sockets in these sets have a cutout and extra length so you can reach and twist nuts without having to disconnect your line.

Snap-Open Ratcheting Box Wrenches

Open the jaws to fit around a fastener like an open-end wrench; close the jaws and the wrench acts like a ratcheting box wrench.

Snap-Open Ratcheting Box Wrench Sets

Open the jaws to fit around a fastener like an open-end wrench; close the jaws and the wrench acts like a ratcheting box wrench.

Changeable-Head Torque Wrenches

Change heads to use these tools as an open-end, box, square drive, or hex-key wrench.

Strap and Chain Wrenches

Secure-Grip Chain Wrenches

Turn the adjustment screw and squeeze the handle to lock the chain in place; press the lever to release.

Secure-Grip Strap Wrenches

While some wrenches require you hold the strap, these have a shackle that keeps the strap closed for extra turning force and quick adjustment.