JBO Thread Ring Gauge (GO) - UNC - Left Hand - 2A - 3/4 x 10 FMH FLH FHH S&E A&NF M&D Taper shank with standard length

Taper shank with standard length for secure fit: Provides stable seating in compatible toolholders

and reliable performance on mold/die steels and common alloys

Right‑Hand NoGo Design for Fast QC: Designed to quickly identify non‑conforming threads

This reamer is designed to deliver a precise bore with tight tolerance while maintaining stable cutting and efficient chip evacuation

JBO Thread Ring Gauge (GO) - UNC - Left Hand - 2A - 3/4 x 10 FMH FLH FHH S&E A&NF M&D Taper shank with standard lengthThe JBO Thread Ring Gauge (GO) for UNC Left Hand threads, 3 4 x 10 with 2A tolerance, is a dedicated go no go tool designed for fast, reliable measurement of external threads. Built for engineers, inspectors, and shop floor teams, it helps you quickly verify that each threaded component matches the UNC left hand standard with confidence. Crafted from hardened steel for durability, this gauge resists wear in demanding environments and maintains stable