What thread size should be used for the tubular heater with diameter 12?
The diameter of the tubular heater is in mm. The thread diameter of the fastener is expressed by Mxx, and 1.5 refers to the pitch of the thread.
Pipe diameter=8mm, fastener thread diameter=M12*1.5
Pipe diameter = 10mm, fastener thread diameter = M16*1.5
Pipe diameter=12mm, fastener thread diameter=M18*1.5
Pipe diameter=16mm thread diameter of fastener=M22*1.5
Pipe diameter = 18mm, fastener thread diameter = M24*1.5
Pipe diameter = 20mm, fastener thread diameter = M27*1.5
When pipe diameter=25mm, fastener thread diameter=M30*1.5