JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 6G - M4 x 0.5 Face Mill Arbors - Anti-Vibration The left-hand spiral flute paired

The left-hand spiral flute paired with right-hand cutting promotes smooth

technicians and workshops needing precise bore finishes in metalworking applications

balanced rigidity

this reamer uses M2 high-speed steel for durability and carries ISO H5 tolerance (-0 +

The reamer adheres to DIN 8051 B and ISO H5 tolerance standards to ensure a secure fit and precise hole size

JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 6G - M4 x 0.5 Face Mill Arbors - Anti-Vibration The left-hand spiral flute pairedThe JBO Metric Fine Thread Go No Go Thread Plug Gauge is a precision inspection tool designed to verify metric fine threads quickly and reliably. Suitable for engineers, machinists, and quality focused shops, it tests threaded holes to confirm they accept an M4 x 0. 5 thread within the 6G tolerance. The Go No Go design lets you confirm plugging and rejection at a glance, speeding up quality control and ensuring consistent fits in assemblies. Fast Go