The JBO Thread Plug Gauge - UNF Go-No/Go - Left Hand - 2B - 7/16 x 20 is a precision inspection tool designed to quickly verify threaded holes for UNF threads. It’s ideal for manufacturers, automotive shops, aerospace contractors, and machine shops that need a reliable method to confirm thread conformance. With its exact 7/16 x 20 UNF left-hand threads and 2B tolerance, this gauge provides clear go/no-go results that support accurate fitment and quality control.

Designed for everyday workshop use, the gauge features a knurled body for secure handling and precise alignment. Its dual-end construction supports quick go and no-go checks from different angles, helping technicians complete inspections faster without sacrificing accuracy.

• Go/No-Go quick results: The go-no-go design lets you instantly confirm whether a hole meets the UNF 7/16 x 20 LH thread with 2B tolerance, reducing inspection time and preventing misreads.
• Precise left-hand UNF sizing: The gauge uses exact UNF thread specifications (7/16 x 20 LH) with 2B tolerance to ensure reliable, repeatable measurements for critical assemblies.
• Ergonomic dual-end, knurled body: A textured grip and dual ends enable one-handed operation, easy alignment, and fast checks even in cramped or glove-wearing environments.

Using this gauge helps you streamline threaded-hole inspections, reduces rework and downtime, and provides clear, repeatable results you can trust for critical assemblies in aerospace, automotive, and manufacturing. By clearly identifying non-conforming threads, it supports quality assurance and faster assembly, improving overall workflow and consistency across jobs.