We are specialist in the manufacture of quality screw machine parts. While we carry a large inventory of stocked, standard fittings machined to S.A.E. standards for the Automotive A/C industry, our primary business thrust is in the area of custom orders. Click here to view samples of our custom ordered parts. R.K. Automatic manufactures precision machined parts to our customers' specifications in a variety of material, including aluminum, brass, cold rolled steel, stainless steel and plastics. We are equipped to handle round, hexagonal and square bars, and have the ability to manufacture parts from extruded bars. Our standard catalog is listed below. Please click on a category to view the parts. The parts listed in the catalog are items we build. We do not stock each part, only the items that are the most popular. Standard Fittings - Swivel Type - Steel w/ Yellow Zinc Plated Metric Fittings - Swivel Type - Aluminum & Steel Braze Fittings - Aluminum & Brass "Braze" Ports - Aluminum Retrofit Adaptors CCOT Repair Kit Bodies Weldable Fittings Adapters Service Valve Components Service Components Heater Nipples & Adaptor Fittings