JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 4H - M21 x 1 4 Month Widin it delivers clean radii and

it delivers clean radii and smooth surfaces in tight spaces

Coating: TiAlN (Titanium Aluminium Nitride) for enhanced hardness

The right-hand cutting action paired with a left-hand spiral flute provides stable chip evacuation and steady cutting

secure interface: Creates a tight

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

JBO Thread Plug Gauge - Metric Fine Go/No-Go - Right Hand - 4H - M21 x 1 4 Month Widin it delivers clean radii andThe 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