JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 6H - M39 x 3 FHH making it well suited for

making it well suited for finishing passes as well as aggressive roughing in metalworking projects

Its durable HSS (M2) construction resists wear

and confident purchases in both prototyping and production environments

DIN 8093 with ISO H4 tolerance: Ensures precise dimensions and reliable interchange with compatible tooling and standard inspection methods

The HSS‑E substrate provides reliability under demanding reaming tasks

JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 6H - M39 x 3 FHH making it well suited forThe JBO Thread Plug Gauge is a precision tool built for verifying internal metric threads. Designed for M39 x 3 fine pitch holes with right hand threads, it delivers fast, reliable Go No Go checks to confirm that a hole meets the 6H tolerance and will accept mating components without interference. Its an ideal instrument for machinists, quality control teams, and hobbyists who demand consistent thread accuracy in production or repair work. Go No Go