Inspection Plug Small 9/16 Hex

The Winters Inspection Plug Small 9/16 Hex (part number 6857-01) is a precision-engineered access fitting designed for use in various automotive applications. This aluminum inspection plug provides a sealed access point for checking fluid levels and servicing internal components in differential assemblies. Its lightweight construction makes it ideal for racing and high-performance applications.

Featuring a hex head that accommodates standard socket tools, the 9/16-inch size ensures secure installation and removal without stripping. The black anodized finish protects the aluminum body from oxidation and corrosion, making it suitable for harsh environments. The integrated O-ring seal provides reliable fluid retention and prevents contamination ingress during the service life of the assembly.

Racing teams and restoration shops benefit from the quick access this inspection plug provides for monitoring fluid condition and internal wear patterns. While primarily designed for Winters bell housings, it is essential to verify compatibility with specific differential models to ensure optimal performance.