The JBO Thread Ring Gauge GO for UNEF is a purpose-built inspection tool for verifying external thread diameters on right-hand UNEF threads. Precisely sized for 1 3/8 x 18, it’s ideal for engineers, machinists, inspectors, and quality teams who need fast, reliable go/no-go checks to confirm parts meet threading standards.

Crafted to perform under demanding shop-floor conditions, this Go gauge helps you identify properly conforming components at a glance, reducing guesswork and rework in assembly and QC processes.

• Precise UNEF Go Gauge for 1 3/8 x 18: Matches UNEF right-hand threads to specification, enabling quick and reliable confirmation of minimum material condition during inspection.
• Hardened Steel Construction: Delivers rugged durability and long service life, resisting wear in busy workshops and QC labs.
• Fast, Visual Verification: Intuitive fit and clear reference points let operators determine conformance in seconds, speeding up workflows and reducing inspection time.

Using this gauge translates to consistent quality, lower rework costs, and improved throughput. It supports precise, repeatable measurements across batches, helping teams maintain tight threading tolerances without slowing production. The durable design means fewer replacements and less downtime, giving you reliable performance shift after shift.