JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M55 x 2 FMH FLH FHH S&E A&NF M&D and right-hand cutting to deliver

and right-hand cutting to deliver consistent

Whether you’re refining a prototype or producing parts to tight specs

right-hand threads conform to the standard

and assembly applications where tight control of hole size is essential

Carbide offers superior hardness and edge retention

JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M55 x 2 FMH FLH FHH S&E A&NF M&D and right-hand cutting to deliverThe JBO Thread Ring Gauge (GO) Metric Fine Left Hand 6g M55 x 2 is a precision tool designed to verify external thread diameters with quick, reliable go no go checks. Ideal for quality control teams, machinists, and maintenance professionals, it helps confirm that threaded components meet the exact metric fine standard you require. Crafted from hardened steel, this GO gauge is built to withstand the rigors of daily workshop use. Its durable structure