JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M39 x 3 Face Mill Arbors ISO H5 tolerance on a

ISO H5 tolerance on a straight shank: Ensures precise diameters and compatibility with standard toolholders for quick setup and reliable performance

Radius end geometry for smooth contouring: Provides precise profiling

while the M2 HSS construction stands up to repeated use in common metals

HSS M2 with ISO H5 tolerance (-0 +0

HSS‑E cobalt steel (M35)": Delivers enhanced wear resistance and longer tool life in demanding materials thanks to the cobalt-enriched alloy

JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M39 x 3 Face Mill Arbors ISO H5 tolerance on aThe 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