The MAThread design forces the two thread helixes to align every time without fail. This means that screws with MAThread dog points are shorter, lighter and can be used in more applications than other ...

Dog spikes and screw spikes are the two most common railroad spikes in ... Common sizes are usually between 9-10 / 16in and 5.5-6in long. With a flat-edged point, the chisel-shaped spike is more ...