Specification for threads of exhaust throttle joint

There are the following specifications:

M3:M3*0.5, and the outer diameter of the thread is about 2.85mm; ? M4:M4*0.7, with an outer diameter of about 3.85mm

M5:M5*0.8, with an outer diameter of about 4.85mm? M6:M6* 1.0, with an outer diameter of about 5.85 mm.

0 1: that is, 1\8, and the thread outer diameter is 9.7mm? 02: namely 1\4, and the external diameter of the thread is12.7 mm;

0 1: that is, 3\8, and the external diameter of the thread is16.0mm; ? 0 1: that is, 1\2, and the outer diameter of the thread is 20.0 mm.

Exhaust throttle valve is a valve to control fluid flow by changing throttle cross section or throttle length. It can not only adjust the movement speed of the actuator, but also reduce the exhaust noise.