JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M4.5 x 0.5 Face Mill Arbors - Anti-Vibration 7mm is a high‑performance cutting

7mm is a high‑performance cutting tool designed for precision work in mold and die applications

Ideal for users who need a reliable

stub length designed for rigid guidance in setups

Open-boring setup with pins for repeatable use: Pins keep the collet open during boring in a 5C lathe chuck

smooth bore finishes by hand

JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M4.5 x 0.5 Face Mill Arbors - Anti-Vibration 7mm is a high‑performance cuttingThe JBO Thread Ring Gauge (GO) Metric Fine, Left Hand, 6g, M4. 5 x 0. 5 is a precision Go gauge designed to verify external thread diameters to exacting standards. Its ideal for engineering shops, manufacturing quality control, and field inspections where quick, reliable checks matter for keeping production on track. Built from hardened steel for durability, this ring gauge stands up to daily use in busy environments and maintains accuracy over many