National maintains seventy-five thousand square feet of manufacturing and distribution facilities located in New Jersey and Maryland. We manufacture in accordance with MSS Standard Practice SP-58. Pipe Hangers are stocked from ½" pipe size to 36" pipe size in plain steel, zinc electro plated, hot dip galvanized and stainless steel. National services customers from coast to coast in the United States. We have built a reputation for manufacturing quality products and delivering on time.