The JBO Thread Plug Gauge is a purpose-built tool for precise thread inspection in metric fine-thread applications. Designed for right-hand M28 x 2 holes and rated with a 4H tolerance, this Go/No-Go gauge provides quick, repeatable checks to confirm whether a hole meets spec before assembly.

Its compact, durable design is suited for machine shops, maintenance teams, and quality-control workflows. The gauge combines a hardened steel core with a textured knurled surface for a confident grip, delivering reliable performance through busy days and tight deadlines.

• Go/No-Go Quick Verification: The dual ends deliver fast pass/fail checks for M28 x 2 right-hand threads. The Go end verifies acceptance by threading in smoothly within tolerance, while the No-Go end stops when the thread would be out of spec—helping you avoid guesswork and rework.
• Hardened Steel Durability: Built from hardened steel to resist wear in demanding environments, ensuring long tool life and consistent measurements across many uses.
• Ergonomic Knurled Grip: The textured knurling and balanced fit provide a secure, comfortable grip and precise alignment during measurement, reducing slips and misreads.

With the JBO Thread Plug Gauge, you gain faster, more reliable thread inspection, smoother workflows, and greater confidence in part fits. Use it to verify production holes, streamline QC checks, and protect assembly quality—so you can ship components with consistent thread integrity.