JBO Thread Plug Gauge - Metric Coarse Go/No-Go - Right Hand - 4H - M2.2 x 0.45 ER Collet Chucks The 2-flute neck-type ball nose

The 2-flute neck-type ball nose enables accurate contouring and detailed profiling on complex graphite parts

Left-hand spiral flute with right-hand cutting for stable chip flow: Ensures consistent bore sizes and reduces chip packing for reliable finishes

Material: HSS-E with 8% cobalt for enhanced heat resistance and wear resistance

and delivers dependable results across materials

it uses a left-hand spiral flute with right-hand cutting for controlled material removal and a clean finish

JBO Thread Plug Gauge - Metric Coarse Go/No-Go - Right Hand - 4H - M2.2 x 0.45 ER Collet Chucks The 2-flute neck-type ball noseThe JBO Thread Plug Gauge is a precision inspection tool designed for metric coarse threads. Its ideal for engineers, machinists, buyers, and maintenance teams who need fast, reliable checks to confirm threaded holes will accept the right components before assembly. With a straightforward Go No Go design, this gauge makes it easy to verify hole size and tolerance at a glance, helping you reduce guesswork, prevent misfits, and speed up quality checks