GRACO Fill Stud - 1/4 NPTF Female - (SKU: 557896)The GRACO 557896 Fill Stud is a threaded fitting designed for use in fluid handling systems. It features a 1 4 NPTF (National Pipe Taper Fuel) female thread, making it suitable for connecting hoses or pipes in lubrication and fluid transfer applications. The material is not specified in available sources, but GRACO industrial fittings are typically made from durable metals such as steel or brass for reliability in demanding environments. Its intended

low to medium speed mixing of low to medium viscosity fluids within GRACO equipment

particularly for applications requiring resistance to corrosion and high-pressure conditions

Ensure compatibility of materials with valve wetted parts

but it is engineered for durability and superior performance in line marking tasks

GRACO and Airlessco airless paint sprayer equipment

Use recommended maintenance procedures to extend service life

Ensure power supply matches pump requirements (380–480 VAC 3-phase)

Designed for outstanding performance and durability

GRACO 390 Cordless paint sprayer

Faster changeover with spring-loaded pilot valves

Clean the seating area thoroughly before fitting the o-ring

It is engineered to manage and direct high volumes of abrasive media and air