JBO Thread Plug Gauge - Metric Coarse Go/No-Go - Right Hand - 6G - M39 x 4 Endmill25 stable cutting: Reduces vibration and

stable cutting: Reduces vibration and chatter to produce cleaner surfaces and tighter tolerances in mold and die work

0 mm corner radius delivers dependable cutting performance and predictable results

intricate ribs with consistent

Durable M2 HSS with straight shank: Built for long tool life and compatibility with standard reaming setups

and secure clamping range create a reliable

JBO Thread Plug Gauge - Metric Coarse Go/No-Go - Right Hand - 6G - M39 x 4 Endmill25 stable cutting: Reduces vibration andJBO Thread Plug Gauge Metric Coarse Go No Go Right Hand 6G M39 x 4 is a precision inspection tool designed to verify internal threads in metric coarse sizes. This go no go plug gauge helps machinists, quality inspectors, and assembly technicians quickly confirm whether a threaded hole matches the intended M39 x 4 coarse thread, ensuring proper fitment of mating parts. Constructed from hardened steel and engineered for durability, this gauge withstands