Screw Pitch American National
Number of Blades 30
Threads per mm: 4, 4.5
5, 5.5, 6, 7, 8, 9, 10, 11,
11.5, 12, 13, 14, 15, 16, 18,
20, 22, 24, 26, 27, 28, 30,
32, 34, 36, 38, 40, 42
Features & Benefits
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
