We have a large inventory of 3/8 Industrial Interchange Pneumatic Fittings including couplings and plugs. We also carry a full line of stainless steel fittings in various sizes, alloys and end types. 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 a variety of 3/8 Industrial Interchange Pneumatic Fittings 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. 3/8 Industrial Interchange Pneumatic Fittings are pressure rated to 250 psi with a temperature range of -4 to +176. The 3/8 Industrial Interchange pneumatic coupling has a steel ball locking mechanism on the mating nipple. Common applications include compressed air, grease, paint and limited gases.