Thanks

With respect, M4 is 4mm major diameter which is 4/25.4 in inches= 0.157, which would make my calculation correct European versus US Screw sizes!!

Geoff


Quote Originally Posted by zipdogso View Post
Looks good...you've done your research.
It's a moot point, so long as you don't crack your pelts but 15lbs per screw is well over 250psi.

T = (C x D x F x in²) / (# of screws)

T lbs per screw
C is torque coef. 0.2 = stainless steel
D nom. size M4 = 0.112
F force we will use 300psi
in² 2x 62mm x 62mm = 11.52

(0.2 x 0.112 x 300 x 11.52) / 6 = 12.9 lbs per screw for 300psi

Torque wrenches are often way over ...more often than not starting at 20inch lbs you needed a torque screwdriver - much smaller torques.

Pleased to see you got yourself a nice variable PSU those meanwell things are not as useful as they could be.