The JBO UNF Go-No/Go Thread Plug Gauge is a precision tool engineered to verify UNF-threaded holes with fast, reliable checks. Ideal for manufacturers, automotive shops, and aerospace assembly, it delivers a clear pass/fail indication to confirm parts meet Unified thread standards and specifications.

Designed for a right-hand orientation and 3B tolerance in the 3/8 x 24 size, this gauge provides consistent, repeatable measurements you can trust across production runs, inspections, and supplier audits.

• Go/No-Go quick verification: Dual ends provide an immediate, easy-to-interpret pass or fail assessment, speeding up quality checks and reducing guesswork on threaded holes.
• Right-hand 3B, 3/8 x 24 UNF sizing: Precisely matched to standard UNF specifications, ensuring reliable checks that align with part drawings and acceptance criteria.
• Durable, ergonomic construction: Rugged materials with a textured knurled body offer secure handling and long tool life in busy shop environments, even when working in tight spaces.

Using this plug gauge simplifies quality control, helping you spot nonconforming threads before assembly, cut downtime, and maintain consistent performance across parts and batches. It supports faster inspections, better first-pass yields, and greater confidence in every fitment.