What about the plum nut screw?
1, must use the best screwdriver, steel mouth, pay attention to force the screws, don't let it slip.2 with a screw release agent, you can make the screws easier to unload.3, it is impossible to use a drill bit to screw down, and tap holes, replace the big screw.
With a small file, fell into a word, and then take down the word screwdriver. Or use of iron screw heating, and then use the word screwdriver screw.You can find a good quality big screwdriver, withstand screws, gently tap, hit a notch, then screw. It's better to spray some lubricant before screwingYou can flatten the screws and replace the stainless steel screws if the conditions permit
To find a screw size of the steel bar, do first Qin oil treatment on the screw, and then use the steel bar with a hammer vibration. It can solve the problem that general,
