Technical Data:
Meet international standard API5B
Used to check run-out thread root and ensure the external thread is sufficiently long and is a true run-out thread
Range: 0-4mm
Dial indicator stroke: 5mm
Dial indicator graduation: 0.01mm
Accuracy: 0.02mm

Dimensions:
Reference dimension=50.8mm
Reference dimension=26mm
Reference dimension=99mm
Spherical radius=SR1.45mm
Movable probe/reference dimension=2mm
Body diameter=dia.40mm