Stainless steel transition fittings bulkhead union straight are designed to connect soft tube on one end and metal tube on other end through a pannel in straight line; one side is stainless steel push to connect fitting configuration with bulkhead, another side is stainless steel compression tube fitting configuration. Stainless steel transition fittings bulkheadunion straight are used for air, pneumatic, food & beverage, chemical, medical & pharmaceutical systems. They are suitable for use with both hard & soft tubing. They have an 316 stainless steel body, 316 stainless steel collet and FKM (Viton) seal one the push to connect fitting end, and 316 stainless steel nut, back ferrule, front ferrule on other end. Designed for use with soft tubing, include polyurethane, polyethylene, nylon, Teflon tubing and hard pipe include stainless steel, carbon steel, copper, titanium, aluminum pipe, Accommodate metric tubing O.D ranging from 4 mm to 16 mm and inch (imperial) tubing O.D from 1/8" to 1/2".