Technical Data:
Meet international standard API5B
Range: 1mm
Dial indicator graduation: 0.01mm
Accuracy: 0.02mm
Measurement principle: set zero on standard block, then measure workpiece

Dimensions:
Reference diameter=dia.30.3mm
Reference length=83mm
Movable point radius=SR2.2mm
Fixed point radius=SR2.4mm

Remark:
Can measure 4 1/2in to 13 3/8in buttress thread

Optional:
Buttress thread tooth thickness standard blocks: 6253 series