JBO Thread Ring Gauge (GO) - UNC - Right Hand - 3A - No. 4 x 40 End Mill Holders finishing)

finishing)

and a durable clamp helps you achieve reliable finishes

The variable index distributes cutting edges to reduce forces and heat

2 corner radius preserves geometry and delivers clean

and stands up to the rigors of high‑speed CNC milling

JBO Thread Ring Gauge (GO) - UNC - Right Hand - 3A - No. 4 x 40 End Mill Holders finishing)Introducing the JBO Thread Ring Gauge (GO) for UNC threads Right Hand, 3A, No. 4 x 40. This GO gauge provides precise external thread diameter verification, helping machinists, inspectors, and quality teams quickly determine whether components conform to UNC standards. Built for reliability in busy environments, it supports accurate go no go checks across diverse industries. Precise UNC GO verification: Delivers reliable go no go checks for No. 4 x 40