Screw the protective sleeve screw protective cover, also known as screw shields, also known as retractable shield. Screw protection purposes: protection screw, light bar, column, shaft parts from dust pollution. 
 This product is made of nylon cloth, insulated coil, rubber echo cloth anti tarpaulin, tarpaulins, flame-retardant fabric, acid cloth, and other various materials tailored for the different needs of customers. General elongation of sheath and compression ratio of 1000:150, product shape can be designed and manufactured according to customer requirements, polygonal screw shields, rectangular screw shields, cylindrical screw guard, also available on demand ratio greater or smaller sheath. Stretched or compressed to the movement, diameter, stretching the length of connection with the mechanical components of unrestricted flexible. Use can be installed in the mechanical internal or external, vertical or horizontal. Screw protective cover has a dustproof, waterproof, oil proof, anti-emulsion and chemicals, anti-iron resistance, tensile, and impact without deformation, corrosion resistance, long life characteristics. Protective cover installed in the protected pieces of two-side flange, and is protected to implement non-contact connection. The protective sleeve and between the flange connection security is to rely on its own pre-compression elastic, stable operation in the work, flexibility, and low noise, the surface was shiny black, and most of France on the machine Lan pieces of coordination. According to user requirements to the production of white screw protective cover. Screw protective cover made of high quality spring steel heat treated, rolling screw, shaft, rod parts the protection. The protective sleeve installed in the protected pieces of two-side on the flange, and the protected parts the implementation of non-contact connection.