JBO Thread Ring Gauge (GO) - Metric Coarse - Right Hand - 4h - M18 x 2.5 ER Collet Chucks It is BS 328/4-compliant and

It is BS 328/4-compliant and finishes holes to ISO H5 tolerance (-0 to +0

Its cobalt-infused HSS construction stands up to heat and wear during extended reaming cycles

4-flute design for efficient material removal: More cutting edges provide consistent chip load and faster material removal

Ball Nose Geometry for Precise Curves: Delivers accurate radius control and smooth surface finishes on curved features

and hobbyists who need precise hole sizing with consistent finishes

JBO Thread Ring Gauge (GO) - Metric Coarse - Right Hand - 4h - M18 x 2.5 ER Collet Chucks It is BS 328/4-compliant andThe JBO Thread Ring Gauge (GO) for Metric Coarse, Right Hand, M18 x 2. 5, is a precision tool designed to verify external threads on fasteners and machined components. Ideal for engineers, quality control teams, buyers, and shop floor technicians, it provides a fast, reliable check that parts conform to the M18 x 2. 5 coarse thread standard and fit requirements. Precise GO measurement for M18 x 2. 5 Right Hand threads: Quickly determine if a part