Stainless steel 316L bulkhead elbow union  

A stainless steel pneumatic bulkhead elbow fitting is a type of fitting used in pneumatic systems to connect two tubes at a right angle through a bulkhead or wall. It is made of stainless steel, which provides excellent corrosion resistance and durability. The fitting has a threaded end that can be screwed into a bulkhead or wall, allowing the tubing to pass through. The other end of the fitting has a barbed or compression fitting that securely connects the tubing. This type of fitting is commonly used in industries such as manufacturing, automotive, and aerospace, where pneumatic systems are used for various applications.