Open Seals - Regular Duty - Steel Item Code: Type: Sold By Quantity Strapping Accessories for Steel Strapping Open Seals Description Regular Duty Open Seals for steel strapping are the most common seal for regular-duty applications; open seals allow you to place the seal on after tensioning has occurred; also occasionally referred to as snap-on seals. Regular duty steel strapping open seals are made from .020 galvanized steel and are engineered for high joint efficiency with regular duty steel. For 1/2" steel strapping use our item # 20630 (A480 Manual Crimper). For 5/8" steel strapping use our item # 20631 (A580 Manual Crimper). For 3/4" steel strapping use our item # 20632 (A680 Manual Crimper).