JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6h - M4 x 0.5 Morse Taper Adaptor smooth holes with fewer passes

smooth holes with fewer passes and tighter control over your machining outcomes

68 mm: a precision stub reamer designed to finish drilled holes to ISO H4 tolerance with a straight shank for easy mounting in standard toolholders

The robust HSS‑E material and precise geometry translate to dependable performance across a range of metals

Substrate: HSS-E (M35 cobalt) for extended cutting life

even grip: Holds tool shanks from 3 mm to 32 mm with a uniform clamping force that minimizes slip and delivers consistent results during cutting

JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6h - M4 x 0.5 Morse Taper Adaptor smooth holes with fewer passesThe JBO Thread Ring Gauge (GO) Metric Fine Right Hand 6h M4 x 0. 5 is a precision tool designed to quickly confirm external thread sizes. It is ideal for engineers, machinists, quality inspectors, and workshop technicians who need a fast, reliable go no go check for M4 x 0. 5 threads. Made from hardened steel for durability, this gauge resists wear in busy environments and keeps readings accurate over many uses. Its simple, intuitive design makes it