JBO Thread Plug Gauge - UNC Go-No/Go - Left Hand - 2B - No. 12 x 24 is a precision inspection tool designed to quickly verify threaded holes against Unified thread standards. It’s ideal for manufacturing, automotive, and aerospace environments, as well as maintenance and repair shops, where fast, reliable gauging safeguards fit and function.

With a sturdy, hand-friendly design and exacting dimensions, this gauge enables clear go/no-go decisions that streamline QC workflows, reduce rework, and keep production on schedule.

• Go/No-Go Verification for Fast QC: Quickly determine if a hole’s thread size and tolerance meet UNC Go/No-Go criteria, helping inspectors make rapid pass/fail decisions and minimize downtime.
• Left-Hand UNC No. 12 x 24 (2B) Precision: Specifically sized for left-hand threaded holes in UNC No. 12 x 24 applications, matching 2B tolerance to deliver consistent, reliable gauging results.
• Rugged, Easy-to-Use Construction: Precision-machined metal body with a knurled grip and a corrosion-resistant finish that withstands oil, coolant, and frequent handling in busy shop environments.

By using this plug gauge, you ensure thread holes meet UNC specifications, enabling proper fastener engagement and reliable performance across assemblies. The go/no-go check minimizes downtime, speeds up incoming inspections, and provides confidence that parts will fit when they leave the line. Built to endure demanding workloads, it delivers consistent results over time and supports traceable quality in every batch.