JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6g - M56 x 1 FHH while the left-hand spiral flute

while the left-hand spiral flute aids chip evacuation and cutting control during manual use

Left-Hand Spiral Flute with Right-Hand Cutting: Optimizes chip evacuation and cutting stability

and helps you maintain consistent quality across batches

The straight shank provides reliable alignment in common toolholders

the collet maintains tight tolerances and repeatable performance across many cycles

JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6g - M56 x 1 FHH while the left-hand spiral fluteThe JBO Thread Ring Gauge (NoGo) for Metric Fine threads is a dedicated inspection tool designed to verify external thread diameters with reliable precision. Sized for M56 x 1 (6g) right hand threads, its ideal for manufacturers, machinists, quality control teams, and maintenance technicians who need fast, repeatable go no go checks to confirm parts meet specification. Constructed from hardened steel for long life, this gauge resists wear in busy