The SAE FACE SL. UNION NUT # 4 by SSP Fittings Corp is an essential fitting for hydraulic systems. Designed for ease of use, this union nut features a size specification of # 4, making it compatible with various hydraulic applications. The high-quality construction ensures durability and resistance to wear, while the precise threading allows for secure connections. This union nut is ideal for professionals seeking reliable components for their hydraulic setups, ensuring optimal performance and longevity in demanding environments.