Can anybody tell me how strong our hand can tighten a screw(in Pascal)?

 

Thank you very much and sorry for my English

Hmmm... Im guessing that it depends on the material that the screw is being screwed into.

and the strength of the hand

not to mention the type of screw itself

On something like a 1/4"-20 screw, you can generate of order an inch-pound of torque (converts to about 0.12 Nm, I think). Pascal is the wrong unit for expressing a torque.

the screwdriver is a big factor.

On something like a 1/4"-20 screw, you can generate of order an inch-pound of torque [/b'] (converts to about 0.12 Nm, I think). Pascal is the wrong unit for expressing a torque.

 

Assuming you are a 48 lb. arthritic senior citizen!

I am really sorry for my unclear question.

 

We are not using any screwdriver to tighten it. And it is a small wing screw. About 3 cm wingspan.

 

Thank you very much for your concern

I have tightened one of those pretty tight before. Also, what kind of material are we screwing it into?

its a wing screw? Do you mean a wingnut?

All is steel. The screw is steel, and also its bolt.

And, yes. it is wingnut.

 

Thanks all. And sorry for my English

All is steel. The screw is steel' date=' and also its bolt.

And, yes. it is wingnut.

 

Thanks all. And sorry for my English[/quote']

 

Tighten it until it is snug, then a half-turn more. Tightening it further than that weakens the threads.

Assuming you are a 48 lb. arthritic senior citizen!

Hey !!! I was throwing in some room for the benefit of doubt.