The O'Brien Brass Company has been serving the Automotive and Industrial Markets since 1947. O'Brien stocks a complete line of Compression Fittings, Air Brake Fittings, D.O.T. Push-In, Truck Transmission, Truck Drain & Shut-off Valves, and Pipe Fittings.

O’Brien Brass Company offers the market – Value


These quality products are made in accordance with the applicable D.O.T. and S.A.E. standards.

We often see products in the market that do not meet the above standards. The areas of the product line that are most affected are the pipe fittings, flare fittings, inverted flare, and air brake for copper tubing. 

Why are they below standard? S.A.E. states in great detail the dimensions of the pipe threads, hex sizes and wall thickness that should be adhered to. These standards have been established to help maintain the safety and integrity of braking and fuel systems in vehicles and equipment.  Often fittings with shortened threads, smaller than standard hex sizes, and reduced the wall thickness are substituted. When these avenues are taken, fewer threads are cut in manufacturing, less material is used, and machining time is reduced. This produces a cheaper product.  

Most vehicle manufacturers use the S.A.E. standard as their manufacturing standard. The result being the quality suppliers have the lion’s share of the O.E.M. market.