Welding and locking screws are currently available (some are available)
M22*P1.50
Recommended 2~3mm
Stainless steel/manganese steel
The product structure is restricted, there is no limit on the periphery, and when the waterproof situation is basically met, there will be silica gel (usually 50A hardness, less than or equal to 1.0n*m will not be prominent, but the protection performance is poor)