JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 4H - M34 x 1 Boring Bar Blank M2 high-speed steel reamer designed

M2 high-speed steel reamer designed to finish holes to ISO H5 tolerance with a precise 13

ensuring repeatable hole accuracy across multiple passes

HSS-E (M35 cobalt) substrate with straight shank: Provides enhanced wear resistance and compatibility with standard toolholders

while reliable chip evacuation keeps your milling process running smoothly from start to finish

long-lasting performance in busy workshops and production environments

JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 4H - M34 x 1 Boring Bar Blank M2 high-speed steel reamer designedThe JBO Thread Plug Gauge is a precision tool designed for metric fine threads, ideal for engineers, machinists, quality teams, and hobbyists who need reliable hole thread verification. Specifically calibrated for right hand threads with M34 x 1 pitch and 4H tolerance, it helps ensure threaded holes accept fasteners exactly as intended before assembly. Built for durability, the gauge features hardened steel construction and a knurled body that