The JBO Thread Ring Gauge (GO) for UNF external threads is a precision inspection tool designed for Left Hand UNF fasteners. Sized for 1 3/8 x 12 with a 2A tolerance, this GO gauge provides quick, confident checks of the major diameter to ensure components meet dimensional requirements.

• UNF GO gauge for external threads: Provides quick pass/fail checks against GO limits for UNF external threads, helping ensure Left Hand fasteners meet size specifications with speed and confidence.
• Left Hand thread compatibility: Specifically engineered to accommodate Left Hand UNF threads, reducing misreads and ensuring accurate inspections of LH components.
• Hardened steel construction: Built to withstand daily use, delivering lasting accuracy and resistance to wear in busy workshops.

With the JBO Thread Ring Gauge (GO) – UNF, Left Hand, 2A, 1 3/8 x 12, you can streamline quality checks, minimize rework, and maintain consistent measurement results across production runs. Its durable construction and precise Go gauge design provide reliable performance for technicians, engineers, and quality teams in manufacturing, maintenance, and assembly environments.