The JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads. It’s specifically suited for right-hand M28 x 1.5 holes with a 4H tolerance, allowing quick verification of whether a bore will accept a mating thread. Ideal for engineers, machinists, quality inspectors, and shop floor technicians, this gauge helps ensure components fit together with confidence.

It enables fast Go/No-Go checks that streamline quality control without sacrificing accuracy. By quickly confirming proper thread size and pitch, it reduces guesswork, minimizes rework, and speeds up setup in production and assembly environments.

• Go/No-Go Verification for Quick Quality Checks: See at a glance if the hole meets the M28 x 1.5 4H spec, speeding inspections and cutting downtime.
• Precise Metric Fine Thread (M28 x 1.5, 4H): Specifically calibrated for the target thread class to deliver consistent, repeatable results across parts and batches.
• Rugged Hardened Steel with Knurled Grip: Built for durability in demanding workshops; the textured handle ensures secure handling, even with gloves.

Using this gauge helps you maintain consistent thread quality across assemblies, reduce rework, and improve overall workflow efficiency. Its durable construction and reliable Go/No-Go performance give you confidence in every measurement, making it a dependable addition to any precision manufacturing, inspection, or assembly process.