goto e-gunparts.com, they should have what you need.
This is a stevens model 39A. The stevens 59A, B and C all had the takedown screw in front of the trigger guard.
Try e-gunparts.com, gun show, gun shop, etc..
It's probably a pin instead of a screw, and according to e-gunparts.com, it's called the Trigger Pin.
You can prevent a ball screw from falling by using some adhesive on the ball screw connection. This can help to ensure that the ball stays on.
That shotgun was made for Sears by Savage/Stevens and is basically the Stevens 59A bolt-action. Remove the takedown screw from the bottom of the stock and separate the metal from the wood. Remove the bolt stop screw from the left side of the receiver and remove the bolt rearward. We do not recommend any further disassembly.
The monitor mount screw size for this model is typically M4.
The model 39A had a cast trigger guard and the front screw holds the receiver to the stock. The models 59's all have a stamped trigger guard that is held in place with wood screws. The take-down screw is in front of the trigger guard. The model 59B has a black forend tip.
its the screw by your paddle
The one screw basically.
A model E converter does not have an idle screw. Your idle adjustment would be on your Mixer, equivalent of the carburetor.
Scope mounts that mount on the left side of the receiver using the four screw holes are available from Weaver.
Remove the buttplate. Take a very large flat-bladed screwdriver (about 18") and insert it into the hole in the back of the buttstock and tighten the very large screw that attaches the buttstock to the receiver. Shine a light down the hole in the stock & you will see the very large screw.