Sorry- there is simply not enough information in your question to answer it. Which shotgun? Which spring?
Remove the trigger assembly,Remove the sears, Remove the top lever spring, Remove the set screw for the lock, Remove the left hammer spring.
It's probably a pin instead of a screw, and according to e-gunparts.com, it's called the Trigger Pin.
Remove the stock from the receiver by the screw on the underside of the stock. Next, there should be a cap (usually falls off) just below the probe endcap. That endcap covers a hole that fits an Allen screw. That Allen screw adjusts the hammer spring tension. Turning the screw in will increase the tension, thus increasing the power, and turning the screw out will reduce the tension, thus reducing the power.
A Winchoke is a screw in choking device that screws into the end of a Winchester Shotgun. Commonly called a screw in choke, most manufacturers have a different name for their chokes that they made specifically for their products. Screw in chokes eliminate the need for extra barrels with different chokes built in. The screw in choke allows the shooter to change from open chokes to a full choke depending on how wide they want the shot pattern to spread. Winchester makes the Winchoke, Remington makes the Remchoke, Browning makes the Invector choke and so on.
A screw dozer?
Pull pump action back. screw the knurled part at end of stock to loosen it. Remove barrel. Turn knurled part all the way off and plug and spring should come out. Replace spring and replace knurled part. Replace barrel and you're ready.
Not sure which spring you mean, or what you mean by "case"? If you mean the receiver, then you might be referring to the cartridge cutoff spring, or the lever spring? The lever spring is held by a screw just in front of the lever pivot screw, and keeps pressure on the lever, so it wont droop. The cartridge cutoff spring installs in the top of the receiver, with a screw through the top that holds it just behind the chamber. These are my best guesses, since i don't have good info.
ones called a nail the others called a screw. Also you hammer in a nail but screw in a screw. Hope this answer helps. :)
Under the actual gas tank, there will be a screw and a spring on the screw(governor). loosen up that screw until there is only about 2mm on the inside.
The screw is to change between a luminous flame(orange) and non-luminous flame(blue). You should always screw the lock so that it covers the hole first.
it is the large screw with a temperature check pod on it right above the throttle spring
Its located on the right side of the carb. The screw has a spring on it and pretty easy to identify. Good luck