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505L00 - Acetylene B & MC Tank Key Wrench

Packaging: pack of 1
$8.57/EA $7.37/pack of 1 only $7.37/EASave 14%

Usually ships within 3-5 business days

OVERVIEW

Reliable B & MC Tank Key for HVAC and Fabrication

Don't get caught on the job site without the right tool to start your flame. The ESAB 505L00 Wrench is the standard industry key for opening B-style and MC-style acetylene tanks. These smaller cylinders are the backbone of portable brazing, soldering, and light welding applications, commonly used by HVAC professionals and plumbers. Since these cylinders are designed without permanently attached handles to prevent accidental opening during transport, this dedicated wrench is a mandatory addition to your tool bag.

The wrench features a single-ended box design with a square opening, typically measuring 3/16 inches, which is the standard for these valve types. Its simple, flat design makes it incredibly easy to store in a pocket or clip onto a hose organizer. Unlike multi-purpose tools that can slip, this wrench offers positive engagement with the valve stem, giving you the torque needed to crack open a tight valve or seal it shut leak-tight.

Manufactured to ESAB's high standards, this tool resists rounding out over time. It is a small investment that prevents the frustration of stripped valves or the inability to work. Whether you are running a TurboTorch for copper piping or a small oxy-acetylene jewelers setup, the 505L00 is the professional's choice for cylinder operation.

Product Specifications

  • Compatibility: B and MC Acetylene Cylinders
  • Style: Flat Box Key
  • Construction: Heavy-duty metal
  • Application: Oxy-Fuel Welding, Brazing, Soldering
Additional Information
Brand:ESAB
Item:Wrench
Packaging Description:1 per each
Product Type:Cylinder Wrench
Compatible Cylinder Types:B Acetylene, MC Acetylene
Material:Steel

INCLUDED

  • 1 x B & MC Acetylene Cylinder Wrench

APPLICATIONS

  • Opening and closing B-size acetylene cylinders
  • Opening and closing MC-size acetylene cylinders
  • HVAC and Plumbing brazing setups
  • Portable oxy-fuel welding and cutting kits
  • Jewelry repair and light fabrication

FAQ

This wrench is designed specifically for 'B' (Bus) and 'MC' (Motorcycle) style acetylene cylinders which have a small square valve stem.

Small acetylene tanks (B and MC) are typically manufactured without a handwheel to prevent accidental opening during transport. A key/wrench is required to operate the valve.

The opening is designed to fit standard B and MC valve stems, which are typically 3/16 inch square.

It is not recommended. Pliers can strip the brass corners of the valve stem, making it difficult to operate the valve safely in the future.

No, standard propane cylinders usually have a handwheel or a different valve configuration. This is specific to acetylene B and MC valves.

For safety, the wrench should be left on the valve while the cylinder is in use to allow for emergency shut-off, but removed during transport.