JBO Thread Ring Gauge (GO) - UNC - Left Hand - 2A - 1/4 x 20 G helping you reject nonconforming parts

helping you reject nonconforming parts without guesswork and speed up quality control

this gauge delivers outstanding durability and wear resistance

while the notch-free neck and W coating minimize downtime due to wear or breakage

you can rely on consistent results across jobs and operators

JBO Thread Ring Gauge (GO) - UNC - Left Hand - 2A - 1/4 x 20 G helping you reject nonconforming partsThe JBO Thread Ring Gauge GO for UNC Left Hand 1 4 x 20 (2A) is a precision inspection tool designed to quickly verify external thread diameters and confirm conformance with UNC standards. It serves engineers, machinists, inspectors, and quality teams across manufacturing and maintenance settings by delivering fast, reliable pass fail checks on threaded components. Manufactured from hardened steel for exceptional durability, this GO gauge withstands