Sealing System Components Since 1972, Viking Plastics has served the automotive and HVAC industry as a global supplier of engineered, injection molded, and assembled sealing solutions. Our goal is to provide our customers with leading-edge technology, a commitment to continuous improvement, and “one stop shopping” to handle all of your prototype, production, and value-added requirements. Viking Plastics offers a complete line of proprietary and custom sealing solutions to address a customer’s assembly and regulatory requirements. From threaded HVAC caps designed specifically for a given refrigerant/fluid and valve, to push on shipping caps used in a variety of protective applications to an engineered custom cap designed for a specific application, we can supply your sealing solution or protective cap needs. Download Brochure Request A Quote Contact Us HVAC Chargeport Caps View Caps Slimline Cap View Caps Seal Washer Caps View Caps Peanut Caps View Caps Dual Line Caps/Compressor View Caps TXV Shipping Caps View Caps Valve Caps View Caps Drain Plugs View Plugs MSF Caps View Caps