The JBO Thread Ring Gauge (NoGo) is a precision testing tool designed to verify external threads for 1/4-20 UNC, right-hand, class 3A. It’s ideal for manufacturing, automotive, aerospace, and quality teams that need fast, reliable thread inspection to confirm proper fit and function.

Crafted from hardened steel for durability, this NoGo gauge is built to withstand daily use in busy production environments while preserving accurate dimensions for repeatable inspections.

• Durable hardened steel construction: Withstands daily handling and cleaning while preserving precise measurements for long‑lasting reliability.
• Accurate UNC 1/4-20 NoGo design (Right Hand, 3A): Precisely machined to the standard, enabling quick pass/fail checks and helping ensure proper thread engagement.
• Ergonomic, user-friendly ring geometry: Knurled edge and compact profile provide secure handling and fast setup on the shop floor, reducing inspection time.

Using the JBO NoGo Thread Ring Gauge streamlines quality checks, minimizes downtime from mismatched parts, and supports consistent, reliable results across assemblies and return-to-service work.