The DLC coating has the following advantages: ─ High hardness, extremely wear resistance; ─ Low friction coefficient; ─ Corrosion resistance
Plug gauges: GO is coated, NO-GO is not; Ring gauges: GO is coated, NO-GO is not
The following thread ring gauges and plug gauges are available with DLC coating: Metric fine thread ring gauges and plug gauges (4139, 4129 series); Metric thread ring gauges and plug gauges (4130, 4120 series); American standard thread ring gauges and plug gauges (4131, 4121 series)