Single start

Double start

Triple start

Quadrapple

Core dia of thread

Major dia of thread

Effective dia of thread

Depth of thread

3.5 mm

8.5 mm

10.5 mm

12.8 mm

2 mm

3 mm

3.5 mm

4 mm

By stating dia and pitch

By stating dia and angle of thread

By stating core dia and pitch

By stating dia, pitch, and no. of start