Variable thread tie screws
The variable thread tie screw is designed to anchor all categories of railway track on wooden ties.
- Improved attachment of the rail fastenings to wooden ties.
- Increased durability of the wooden tie.
- The effective tightness of the fastening is maintained over time compared with that of an ordinary thread tie screw.
- Non-loosening under the effect of vibrations.
- Waterproof : avoiding the penetration of damp, which causes the detoriation of wood