JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M26 x 2 FMH FLH FHH S&E A&NF M&D 68 mm with a standard

68 mm with a standard length

Easy-to-use inspection tool for fast non-conforming part identification: Intuitive checks let operators identify rejects quickly

repeatable results—from quicker setup and fewer tool changes to cleaner cuts and longer tool life

It uses an ER16 collet with an M16 thread and a 70mm gauge length

10 mm reamer is made from standard HSS (M2) to deliver reliable

JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M26 x 2 FMH FLH FHH S&E A&NF M&D 68 mm with a standardThe JBO Thread Ring Gauge (GO) Metric Fine is a precision tool designed to verify external thread diameters across a range of industries. Its ideal for engineers, quality teams, machinists, and maintenance technicians who need fast, reliable checks to ensure threaded parts meet exact standards. Designed for metric fine threads and optimized for left hand applications, this gauge covers M26 x 2 with a 6g tolerance class. Its GO designation supports