The JBO Thread Plug Gauge - UNF Go-No/Go - Right Hand - 3B - 1 3/8 x 12 is a precision inspection tool designed to verify internal UNF threads quickly and reliably. It’s essential for manufacturers, automotive shops, and aerospace maintenance teams that depend on accurate thread measurements to ensure proper fit and safe operation.

• Go/No-Go quick check: The go/no-go design provides immediate pass/fail feedback on threaded holes, speeding inspections and reducing guesswork for quality control and assembly.
• UNF Right-Hand, 1 3/8 x 12, 3B sizing: Precisely machined to the specified size and thread class, ensuring consistent, reliable measurements across parts and production runs.
• Ergonomic, knurled body for easy use: The textured grip and robust ends offer secure handling and smooth operation in busy workshops, even when wearing gloves.

Using the JBO Thread Plug Gauge improves workflow by delivering quick, unambiguous results, reducing rework, and helping you maintain high-quality standards across production. Its durable, user-friendly design inspires confidence in every measurement and supports faster, more reliable maintenance and inspection decisions.