The JBO Thread Plug Gauge is a left-handed metric coarse Go/No-Go gauge designed to verify M24 x 3 threaded holes quickly and reliably. With 6H tolerance, it helps engineers, machinists, and inspectors confirm that holes meet the intended LH thread specification and will accept the correct components.

Built for daily workshop use, the gauge is made from hardened steel for long wear and dependable performance. The knurled body provides a secure grip, while the precision ends enable repeatable go/no-go checks even in greasy or gloved conditions.

• Go/No-Go quick verification: Efficiently confirm whether a hole meets the M24 x 3 LH coarse thread — the go side fits, the no-go side does not — enabling fast pass/fail decisions and reducing inspection time.
• Durable, hardened-steel construction: Hardened steel stands up to daily use in busy shops; knurled grip reduces slips and helps maintain consistent measurements across cycles.
• Left-hand metric coarse specification (M24 x 3, 6H): Specifically tailored for LH M24 x 3 coarse threads with 6H tolerance, ensuring accurate compatibility with mating parts and reliable results.

Adopted by technicians and quality teams for streamlined QA, this plug gauge helps you speed up inspections, cut downtime, and maintain consistent threading quality across your production line.