JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M39 x 3 Face Mill Arbors more uniform surface finish on

more uniform surface finish on stainless and exotic metals

HSS M2 with ISO H5 tolerance (-0 +0

By combining precise contouring

Flute design: Left-hand spiral flute for efficient swarf evacuation and stable guidance

and compatibility with common setups

JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M39 x 3 Face Mill Arbors more uniform surface finish onThe JBO Thread Ring Gauge (GO) Metric Fine Right Hand 6g M39 x 3 is a precision tool designed to verify external thread diameters and pitches quickly and reliably. Its ideal for engineers, machinists, inspectors, and quality teams who need clear go no go checks to confirm parts meet standard specifications. Made from hardened steel for durability, this GO ring gauge stays accurate through repeated use in busy shops and QC labs. Its right hand