Meet the JBO Thread Plug Gauge — a precision inspection tool designed for technicians, engineers, buyers, and hobbyists alike.
This Go/No-Go gauge verifies right-handed threads in Pg 13.5 x 18 with quick, clear pass/fail checks, helping you confirm fit and prevent costly threading errors.

• Two-ended Go/No-Go design: quickly determine if threads meet the required limits — one simple check identifies conforming and non-conforming parts, speeding up quality control and reducing rework.
• Standardized Pg 13.5 x 18 dimensions for right-hand threads: precisely matched to Unified thread standards, ensuring reliable fitment and consistency across components and assemblies.
• Rugged knurled body with corrosion-resistant finish: built for demanding workshop use, providing a secure grip and long life in busy environments without compromising precision.

This plug gauge helps streamline quality control, minimizes downtime, and improves finish quality by delivering repeatable, trustworthy thread verification. Whether you’re in manufacturing, automotive, or aerospace, rely on accurate checks that support better assembly outcomes and fewer thread-related issues.