What Thread Is a Gas Bottle

BSP threads are the most common and can be used for gas and water. The sizes are imperial. To get a 100% seal with gas you use a yellow thread or Liquid thread seal.

What size is a gas bottle thread?

Firstly, let’s cover the most common gas fittings you’ll find on a gas bottle. Many 1kg through to 4kg cylinders have a male 3/8″ Left-Handed thread that points directly up from the top of the bottle. This fitting is often called ‘Companion’ but is used by many brands.

What thread is on a small propane bottle?

1/4″ NPT Female Thread Fits almost all 1 lb propane tank bottles, hose and regulator.