Now widely used in screw locking processing fasteners precoating technology is developed in the United States and Germany took the lead in the world, one of which is a special technology to make special engineering resin permanent adhesive on the teeth, using elasticity of engineering resin material, make the bolts and nuts in the process of locking by squeezing against vibration and impact resistance, completely solve the problem of screw loose. Nb is a registered trademark used by the Taiwan company for the use of screws and anti-loose processing products, and the screws that will be treated by the company will be named as the landing screw. 
