Just got a winchester(I think)it says on the barrel ted williams and underneath that is sears and roebuck serial#273.582140,and it says its a model 100.I need to find some screws for it and was wondering whats the age of the rifle can you help me.Feel free to give me some history and whatever about the rifle.Thanks.

The Model 100 is just a post-64 Winchester, order your screws for it from the post 2,700,000 serial number lists.
Most part suppliers, like Brownells ask if the weapon was made before or after that serial no.