T Nuts Tee Sliding Slot Nuts 20 Series M3 Threaded Slide in Pre-Assembly for 20x20 Aluminum Extrusions Frame with Profile 2020 Sereis 6mm Slot for CNC Router Build Rail 3D Printer 50pcs
High quality carbon steel, moisture resistance, oxidation resistance, corrosion resistance, healthy and lead-free. High hardness, twice as hard as copper.