The JBO Thread Plug Gauge is a precision tool for testing metric fine-threaded holes. Designed for engineers, machinists, quality inspectors, and assembly teams, it verifies that a hole meets the M3.5 x 0.25 fine-pitch standard with a simple Go/No-Go check and a right-hand orientation that matches common production threads. The dual-ended design lets you quickly pass or fail a hole, helping prevent misfits and rework in manufacturing and assembly workflows.

• Go/No-Go design for fast, reliable acceptance: The dual-ended Go and No-Go ends provide a quick pass/fail check, reducing inspection time and preventing misfits in production.
• Metric fine-thread compatibility (M3.5 x 0.25, 5H): Specifically calibrated for fine-pitch metric threads, this gauge yields accurate checks that align with your component specs and improve quality control.
• Rugged, ergonomic construction with knurled grip: Hardened steel core delivers long life and wear resistance, while the knurled body ensures a secure, comfortable grip even in cramped or busy workspaces.

With the JBO Thread Plug Gauge, you gain a reliable, repeatable method to verify threaded holes, accelerating setup and inspection while enhancing overall quality. It helps you catch undersized or oversized threads before assembly, reduces downtime from rework, and supports consistent results across batches. Built to endure daily use thanks to hardened steel construction and a thoughtful ergonomic design, this gauge is a dependable addition to any workshop or production line.