Have you ever wondered how an Allen screw is made? In this quick and easy DIY guide, we show you the fast process of creating your very own Allen screw with minimal tools and time. Whether you're a ...

Some screws are turned by hand, others lost their head, and one looks like a sea monster. It might be time you read up on ...

An arrayed differential flexible butterfly-shape eddy current sensor is proposed to detect the surface defect of iron screw thread in this paper, which has one butterfly-shape coil, four sets of ...