Plug

The Winters level plug (1/2-20 thread, socket head design) is a precision sealing component engineered for differential covers and gear assemblies in high-performance automotive and industrial applications. This compact yet critical fastener prevents fluid loss while maintaining pressure integrity in transmission and differential housings. Whether you're servicing a performance differential, rebuilding a gearbox, or maintaining heavy-duty equipment, a reliable level plug ensures your system stays sealed under demanding conditions.

Manufactured from durable steel and finished with zinc oxide coating for corrosion resistance, this Winters plug features a 1/2-20 metric thread with an O-ring seal that creates a watertight, leak-proof barrier. The socket head design allows for secure engagement with standard hex tools, while the integrated O-ring eliminates the need for additional gasket material—a critical advantage in high-vibration environments where conventional seals can fail. Designed specifically for Winters side bell and gear cover assemblies, it delivers OEM-equivalent reliability at a fraction of the cost of factory replacement parts.

Technicians and builders working on Winters differentials, drag racing platforms, and street performance vehicles depend on this plug to eliminate weeping seals and pressure loss. Its compact 1.85 x 0.45 x 2.35-inch footprint and minimal 0.02 lb weight make it an easy inventory item for repair shops and performance shops alike. Installation is straightforward: simply clean the mating surface, apply a light thread sealant if desired, and torque to manufacturer specifications. For anyone rebuilding or servicing a Winters differential or similar precision gearbox, this O-ring sealed level plug is an essential, cost-effective upgrade that prevents fluid contamination and maintains system integrity.