Features: Crafted from premium 70 stainless steel, these 15pcs M8x20 T bolt screws deliver 700N/mm² tensile strength for rustproof, erosion resistant performances in extreme temperatures. Precisely engineered hammer heads screws pair seamlessly with 8mm flange nut , featuring smooth threads and burr without surfaces for effortless installation and rock solid connection. Ideal for solar panel installers, greenhouse builders, and industrial contractors requiring stable fasteners for structural framework and heavy equipment assembly. Optimized for securing photovoltaic aluminum profile, solar mounting rails, and T slot track systems in outdoor solar farms or indoor mechanical workshops. The hammer heads designs enables precise alignment adjustments in components, while alloy construction ensures lasting durability across repetitive installations. Specifications: Component : Stainless steel Thread specification: 8mm Length: about 22mm/1inch Package Includes: 15 pcs flathead Screws note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.