Technical Data:
Meet international standard API5B
Measure height of internal thread with nominal diameter less than 5 1/2in (139.7mm)
Range: 0-0.135in / 0-3.5mm
Resolution: 0.0005in / 0.01mm
Accuracy: 0.02mm

Dimensions:
Body/reference diameter=dia.42mm
Reference length=300mm
Included/reference angle=<50deg

Optional:
Wireless transmitter: 7315-50M (receiver required)
Thread height standard blocks: 6250 series