JBO Thread Plug Gauge is a UNF Go-No/Go gauge designed to verify right-hand internal threads of 1/2 x 20 with a 2B tolerance. Its dual-ended design provides fast, clear go/no-go readings to confirm holes conform to Unified thread standards and specifications.

Engineers, machinists, inspectors, and hobbyists rely on its precise dimensions and rugged construction for repeated use across manufacturing, automotive, and aerospace applications. The gauge’s knurled body offers a confident grip for accurate checks in busy work environments.

• Go-No/Go dual-ended design: Quickly determine if the tapped hole meets the 1/2 x 20 UNF right-hand thread with 2B tolerance, delivering a clear pass/fail reading that speeds QC and reduces guesswork.
• Durable, knurled construction: Sturdy metal body with a textured grip stays comfortable and precise under routine shop use, providing reliable checks even in tight or busy workspaces.
• Precise, standards-aligned dimensions: Manufactured to exact UNF 1/2 x 20 right-hand 2B specifications, delivering consistent results across parts and batches for dependable quality control.

With the JBO Thread Plug Gauge, your team can inspect threaded holes quickly and confidently, minimize rework, and maintain steady production quality across assemblies. It helps streamline inspection workflows and support reliable, repeatable results from part to part.