The 4 Steel Inv. Flare Plug Str. from Fittings Unlimited Inc is engineered for optimal performance in hydraulic systems. This 4 size flare plug is made from high-strength steel, ensuring durability and resistance to harsh conditions. Its design provides a secure seal, preventing leaks and maintaining system integrity. Meeting industry standards, this flare plug is compatible with a variety of hydraulic components, making it versatile for different applications. Ideal for both industrial and automotive uses, this fitting is a reliable choice for effective fluid management.