The JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads, specifically tuned for M8 x 0.35 with a Right Hand orientation and 6H tolerance. Ideal for engineers, machinists, quality inspectors, and maintenance technicians, it provides quick, dependable checks to confirm threaded holes will accept components with the correct fit. The Go/No-Go design lets you make fast, confident pass/fail judgments without guesswork, speeding up your inspection workflow.

Built for real-world use, this plug gauge combines a hardened steel body with a rugged knurled grip for secure handling and repeatable results. The Go/No-Go limits deliver clear, actionable feedback, helping you reduce rework and maintain consistent threading quality across parts and batches.

• Go/No-Go quick inspection: Quickly verify hole threads for fast, at-a-glance pass/fail results, cutting inspection time and variability.
• Precise metric fine-thread sizing (M8 x 0.35, 6H): Provides reliable size criteria to prevent over- or under-tapping and ensure proper assembly consistency.
• Hardened steel durability: Withstands daily use in busy shops, delivering long-lasting accuracy and wear resistance.

Used correctly, the JBO Thread Plug Gauge streamlines quality control and assembly workflows. It helps you achieve repeatable hole tolerances, reduces downtime from misfits, and supports reliable, high-quality joins across production runs and maintenance tasks.