Parker A-Lok 4FBC2N-316 316 Stainless Steel Compression Tube Fitting, Bulkhead Adapter, 1/4" Tube OD x 1/8" NPT Female Bulkhead coupling mounts on a wall or bulkhead to connect tubing to threaded pipe through a barrier Fitting connects to tubing on one end and has an NPT female connector on the other Chemically hardened type 316 stainless steel for higher strength and greater corrosion resistance than untreated stainless steel Twin ferrule compression fitting for a leak-resistant seal in high-pressure applications For use with stainless steel pipe and tubing