JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M55 x 1 Face Mill Arbors - Anti-Vibration and reduced downtime in mold

and reduced downtime in mold and die production

while the left-hand spiral flute aids chip control and finishing consistency

DIN 212‑B / ISO H5 tolerance: Delivers precise hole size with easy mounting in standard collets and holders

5 is a precision tool designed to verify external thread diameters with clarity and speed

and improve overall measurement reliability—so you can trust your threaded-hole inspections from first part to last

JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M55 x 1 Face Mill Arbors - Anti-Vibration and reduced downtime in moldThe JBO Thread Ring Gauge (GO) Metric Fine Left Hand 6g M55 x 1 is a precision go no go tool designed to verify external thread diameters quickly and reliably. Ideal for inspectors, machinists, and quality teams across manufacturing, automotive, and precision engineering, it helps you confirm that threaded components meet exact size and pitch requirements for metric fine threads, including left hand applications. Crafted from hardened steel, this