Mechanical Engineering

You should be able to find that information based on the DIN/ISO grade hardware you are planning on using.

You mean something like this ?

https://www.tribology-abc.com/calculators/e3_6f.htm

you could get there, but I was thinking of something like this:

https://www.engineeringtoolbox.com/metric-bolts-minimum-ultimate-tensile-proof-loads-d_2026.html

Or if you mention about some specific join in hydraulic piston , maybe you shood chek it in some specific book about hydraulic pistons

maybe here :

https://www.academia.edu/34291101/Design_of_Hydraulic_Systems_for_Lift_Trucks_Second_Edition

I have only books on ru language so think it wodnt help you on it

I think you can found all formulas here :

https://mechanicalc.com/reference/bolted-joint-analysis

Or here

https://mechanicalc.com/calculators/bolted-joint-analysis/

Thanks guys, Have been out, just now seeing these responses, am currently digesting some of the info...

e-mail the technical support of a nut and bolt manufacturer or distributor to get the real numbers