We have a large inventory of pneumatic fittings including: Mini Type Quick Disconnect, 1/4 Industrial Interchange, 3/8 Industrial Interchange, ARO 210 Interchange, Lincoln Interchange, Parker Interchange, ST Series High Flow, Universal Series. We also carry a full line of stainless steel pipe, tube and fittings. View our full line of stainless steel tube products. We are your pneumatic fittings experts. We also carry a large inventory of stainless fittings and accessories in multiple sizes. Visit our tube sizes and weight chart. We stock thousands of pneumatic fittings covering a variety of pneumatic product series in many specifications. We also offer a large inventory of stainless steel fittings. Check out our stainless steel resource grade chart. It lists multiple functionality and applications of different grades of stainless steel. Our Reference Catalog Catalog identifies thousands of products we carry from pneumatic fittings to stainless pipe. Specification charts and general dimensional illustrations aid in identifying products. View our stainless steel pipe theoretical bursting pressures chart. Pneumatic fittings are used to connect pipe, tube and hose in pressurized gas systems called pneumatic systems. Pneumatic systems have lower pressure and tighter seals than hydraulic systems. There are many different connection types associated with pneumatic fittings such as thread fittings, both male and female threads, hose barb, push on hose barb and many others. Pneumatic fittings are available in many materials such as steel, brass, chrome plated brass and other.