The A-848 SUP 317 Adaptor enables the use of a CGA-510 Acetylene Regulator—typically used with 145 cubic foot or larger acetylene cylinders—on a smaller, 40 cubic foot No. 2 (B) tank with a CGA-520 connection. This adapter efficiently connects a B tank cylinder to a POL acetylene regulator, making it versatile for various welding setups. It features a solid one-piece design capable of withstanding pressures up to 500 PSI. The adaptor ensures a secure and precise fit, with CGA-520 stamped onto the cylinder side and CGA-510 on the regulator side, facilitating easy and reliable integration between different sizes and types of tanks and regulators.