WHAT DOES TYPES OF SCREW HEADS MEAN?

Self-tapping fasteners, as the name implies, tap their own thread. To make use of them, generate a gap a bit lesser in comparison to the diameter of your screw. You'll be able to travel the screw into a fragile product like wood soon after drilling a pilot hole. The screw’s threads will dig into your Wooden and fasten it. frequently in this case

Ejector Button: used for Harmless disposal, the ejector button triggers the descent of the metallic bar, expelling the disposable idea into a squander container. goal: favourable displacement pipettes are applied when working with viscous or risky liquids. They use a piston to displace liquid with out coming into immediate connection with the pipe