JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M145 x 4 FMH is a high-precision finishing tool

is a high-precision finishing tool designed to bring holes to exact size with dependable repeatability

With precision-ground geometry and a robust carbide body

Durable Hardened Steel Construction: Built to withstand frequent use

giving you confidence to push for tighter tolerances and better surface finishes on every job

they provide exceptional concentricity and precise tool positioning throughout machining operations

JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M145 x 4 FMH is a high-precision finishing toolThe JBO Thread Ring Gauge (GO) Metric Fine Right Hand 6g M145 x 4 is a precision tool designed to verify external thread diameters quickly and reliably. It is ideal for engineers, machinists, quality inspectors, and buyers who need consistent, standards compliant thread checks during manufacturing, assembly, or procurement. Crafted from hardened steel, this gauge is built for durability in busy workshops. Its user friendly design provides clear go no