Screw Pitch Whitworth
Number of Blades 28
Threads per mm 4, 4.5, 5, 6,
7, 8, 9, 10, 11, 12, 14, 16,
18, 19, 20, 22, 24, 25, 26,
28, 30, 32, 36, 40, 48, 60
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
Screw cutting gauge included
- 55 Degrees