Arnold Supply is one of the largest fastener suppliers in the United States. It operates a warehouse that can accommodate more than 300,000 different types of fasteners. The company supplies bolt plugs, nuts, socket collars, hinges stamps, metric studs and nylon product terminals. It also offers bin-stocking programs that allow volume purchasing. Arnold Supply additionally specializes in custom packaging. The company offers aerospace, automotive after market, industrial and telecommunications services. It also provides thread forming, shrink tubing, heat sink springs and fuses spacers. Arnold Supply is certified by ISO 9001 and is located in Wallingford, Conn.