King Crimp Style Ferrule 304 Stainless Steel. 304 Stainless Steel. For use with crimp style shanks. Safety notes: Only use the crimp style shanks with the crimp style sleeves and ferrules. Due to differences in dimensions and tolerances for safety reasons, do not interchange other manufacturer's products with Dixon products. Pressure rating given at 70?F, consult Dixon for pressure rating at elevated temperatures.