GAUGE SCREW PICH - 12665
Accurately milled steel blades
Designed to check both internal and external thread forms
Marked with nominal size on each blade
All blades fixed in a steel sleeve
SI should not be used to check ISO
ISO can be used to check SI
Metric/Whitworth
Code No of blades Range
STW77270003 52 0.25-60 mm
4-62 WW