12-14x35-53 CL3 Hex Head Self-drilling Screw with EPDM Washer

Product Overview
The TG Hex Head Self-Drilling Screw is a high-performance self-drilling and self-tapping fastener developed for steel structure enclosure systems. It integrates drilling, tapping, and locking into one, allowing direct penetration of steel plates without pre-drilling to form a solid connection. Paired with highly weather-resistant EPDM rubber washers, it achieves both fastening and waterproof sealing. The surface undergoes a high-corrosion-resistant galvanization process with excellent neutral salt spray test results, allowing it to adapt to complex outdoor environments for long periods. It is widely used in various steel roof and wall construction projects.

Product Applications
Connecting color steel roofing/wall panels to purlins in steel-structured factories, warehouses, and prefabricated houses.
Installation and fixation of profiled steel sheets, galvanized sheets, and other metal plates.
Fixing outdoor metal structures such as sunrooms, rain sheds, billboards, and carports.
Composite roof/wall systems with insulation layers, adapting to installations with different insulation layer thicknesses.