JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 4H - M21 x 1 4 Month Widin with enhanced reliability from a

with enhanced reliability from a carbide body and through-coolant design

delivering stable cuts and clean hole finishes

it delivers straightforward pass/fail feedback that speeds inspection workflows and reduces guesswork during assembly

repeatable hole finishes with dependable performance in production or critical assemblies

reducing rework and enabling steady workflow across production runs

JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 4H - M21 x 1 4 Month Widin with enhanced reliability from aThe JBO Thread Plug Gauge is a precision tool designed for metric fine threads. Its Go No Go design lets you quickly verify hole acceptance, helping ensure parts thread together Cleanly and reliably. Ideal for machinists, quality control teams, assembly technicians, and hobbyists working with metric threads, this gauge speeds inspection without sacrificing accuracy. Go No Go Quick Checks for Fast, Confident Acceptance: Clearly defined Go and No Go