Oil seals are made out of nitrile synthetic rubber with steel stiffener rings. Other rubbers such as viton, silicon, neoprene or poly acrylic can be used for specific applications. The stiffener rings may be stainless steel or brass where highly corrosive fluids are to be sealed. Springs are generally made of spring steel to IS: 4454:Gr.ll or from stainless steel or bronze for corrosion resistance
Beyond its functional significance, the 794 000 spark plug also embodies the continuous advancements in automotive technology. With improvements in materials science and engineering, spark plugs have evolved from simple devices to sophisticated components with advanced features such as iridium tips, which provide better conductivity and longevity.