The JBO Thread Plug Gauge is a go/no-go inspection tool designed to verify UNEF internal threads in holes. Sized for right-hand threads at 1 9/16 x 18, it provides a quick, reliable test that aligns with Unified thread standards.

Designed for engineers, machinists, inspectors, and assembly teams, this compact gauge helps ensure correct fits before parts are mated, reducing downtime and rework across manufacturing, automotive, and aerospace applications.

• Exact UNEF Go/No-Go Size (Right-Hand): Calibrated to the UNEF standard size of 1 9/16 x 18 for fast, decisive go/no-go testing of internal threads, enabling instant pass/fail decisions and preventing incorrect assemblies.
• 2B Internal Thread Tolerance: Implemented with 2B tolerance to deliver consistent, repeatable readings across parts and tools, reducing measurement variance in production and inspection processes.
• Durable Dual-End, Knurled Construction: Dual testing ends allow go and no-go checks in one tool, while the knurled body provides a secure grip and reliable handling in busy environments for long service life.

The JBO Thread Plug Gauge helps you streamline quality control by delivering fast, confident pass/fail decisions for UNEF holes. Its precise size and 2B tolerance minimize rework, while the durable, easy-to-handle design survives daily use on the shop floor. For teams aiming to improve throughput and consistency, this gauge is a dependable ally in achieving accurate, repeatable thread quality across production runs.