Amazon.com: Snowboard Binding Screw Replacement Set – Durable & Rust-Resistant, Universal Fit for Most Snowboards Including Installation Tools : Sports & Outdoors
Binding Hardware – Sports Basement
Amazon.com : Shupakul 10 Pcs Snowboard Ankle Bindings Straps- 7.9 x 0.8 Inch Snowboard Ladder Straps Binding Replacement with Screws for Snowboard Ski Strap-in Binding System : Sports & Outdoors
Stuck Screw in Channel System | Snowboarding Forum - Snowboard Enthusiast Forums
It's good to check your binding screws : r/snowboarding