No.1 Screw

· The No. 1 cross recessed bit type gave its name to the "No. 1 screw"
· Wooden screw with the thickness and length of thin nails. It was designed as an alternative to nails.
· Since the screw outer diameter is thin, it can be screwed in lightly without pilot holes.
· Also, the mating material is unlikely to break and the head diameter is small and does not stand out after use, enabling a clean finish.
· Unlike nails, it has retaining force, as well as remarkably superior pull-out resistance.
· Due to using killed steel and quenching, thread cutting, bending, and cross hole slump are minimized, and even teak and tamo timber can be screw-fastened without pilot holes or dish boring.
· Convenient for frames, floors, and door stops.