Osg 1500102900 Plug Thread Gage 5/8-11 2B Double End

Product Description

The OSG 1500102900 is a double-end plug thread gage designed to verify internal thread conformance on 5/8-11 threaded holes to the 2B tolerance class. One end carries the Go member and the opposite end carries the No Go member, allowing a technician to confirm both the minimum and maximum material conditions in a single tool. The gage body is machined from high speed steel for wear resistance and dimensional stability. A handle is included. This type of gage is standard inspection tooling in machining, fabrication, and maintenance shops where fastener thread quality must be verified before assembly.

The 1500102900 is suited for inspecting 5/8-11 UNC internal threads in production, incoming inspection, and field maintenance contexts. The 2B classification covers the standard commercial tolerance range for inch-series unified internal threads, making this gage appropriate for general-purpose fastener applications across manufacturing and industrial maintenance environments. The double-end configuration eliminates the need to manage two separate gage pieces for a single thread size.

Key Features

• Double-end design with Go and No Go members on a single handle
• 5/8-11 UNC thread form to 2B tolerance class
• High speed steel construction for wear resistance and long service life
• Handle included — ready to use out of the package
• Compact overall length of 4.25 inches for use in confined inspection areas

Compatibility

Designed for inspection of 5/8-11 UNC internal threads conforming to the 2B tolerance class per ASME B1.2 unified inch screw thread gage standards.

Installation Notes

Plug thread gages are used by machinists, quality technicians, and maintenance professionals — no installation in the traditional sense applies. Ensure the threaded hole is clean and free of chips or debris before gaging. Apply light, consistent hand pressure when inserting the Go member; never force a thread gage or use it as a tap. Store the gage in its protective case when not in use to maintain calibration and prevent surface damage.