Large Inspection Plug

The Large Inspection Plug by Diversified Machine is a precision-engineered component designed for fluid system diagnostics and maintenance across industrial, hydraulic, and pneumatic applications. This aluminum inspection plug serves as a critical access point for checking pressure, contamination, and system integrity without breaking down main connections. Built for reliability and ease of use, it's an essential tool for technicians who need quick, non-destructive inspection capabilities on equipment using the DMI Bulldog CT-1 Center and Side Bells platform.

Constructed from anodized aluminum with a durable gold anodize finish, this inspection plug resists corrosion and extends service life in demanding environments. The 1-5/8-12 inch threaded connection ensures secure, leak-free installation, while the 1-inch hex head provides convenient tool engagement for hand tightening and removal. The integrated O-ring seal delivers reliable pressure containment and prevents fluid weeping at the connection point. Its compact 2-inch outer diameter and lightweight design—just 0.1 lbs—make it suitable for confined spaces and high-frequency use without adding unnecessary bulk or weight to systems.

This inspection plug is ideal for fleet maintenance, manufacturing facilities, and hydraulic system integrators who rely on the DMI Bulldog platform for bellhousing applications. Operators benefit from the ability to quickly sample system fluid, verify pressure readings, and detect contamination or wear—all without costly downtime or system disassembly. The gold anodized finish and aluminum construction make it suitable for both industrial and marine environments where corrosion resistance is critical. Installation is straightforward: thread into compatible 1-5/8-12 inch ports and hand-tighten with the hex key until the O-ring compresses for a secure seal.