The JBO Thread Plug Gauge is a precision UNC Go-No-Go tool built to verify threaded holes with clarity and speed. Designed for right-hand threads and class 3B, in the No. 1 x 64 size, it helps quality teams on the shop floor confirm hole acceptance quickly and consistently in manufacturing, automotive, and aerospace environments.

Ideal for inspectors, machinists, and procurement teams, this plug gauge delivers reliable pass/fail results that reduce guesswork during assembly and quality checks. Its rugged construction and precise dimensions stand up to daily use, keeping your measurement process efficient and repeatable.

• Fast, reliable go/no-go checks: Quickly determine if a threaded hole conforms to UNC specifications, speeding inspections and reducing rework.
• UNC right-hand compatibility (3B): Specifically tuned for standard right-hand UNC threads in class 3B, ensuring accurate acceptance or rejection every time.
• Durable, shop-ready construction: Hardened, corrosion-resistant materials with a robust finish withstand daily handling for long service life.

Use this gauge to streamline quality control, improve consistency across parts and assemblies, and protect your production timeline with confident, repeatable thread checks.