Heinrichs Germany produces roughly 150 million precision turned parts in 2,000 variations every year. We have been in business for 75 years and are certified in accordance with ISO/TS16949. We stock our most frequently ordered parts for our customers in the U.S, including a wide selection of metal plugs with captive sealing rings and metric, BSP and UNF threads. We also have vent valves in our product line.