Technical Data:
Meet international standard API5B
Measure crest diameter of internal thread
Range: 2 3/8-5 1/2in / 60.325-139.7mm
Dial indicator stroke: 5mm
Dial indicator graduation: 0.01mm
Accuracy: 0.02mm
Measurement sequence: set left height, set right height, set zero, then measure
Select suitable length of arm according to workpieces where applicable

Dimensions:
L=260mm
A1=112mm
A2=91mm
Reference dimension=27mm
Reference dimension=27mm
Reference dimension=15.875mm
Reference dimension=15.875mm

Optional:
Height standard and zero standard block A (without taper): 2237-G selectable code
Height standard and zero standard block B (with taper): 2237-K selectable code
Final standard-block order number is workpiece-specific and is not expanded without explicit selectable values