90120-HW1-671 Flange (8X45) Bolt - Overview. The 90120-HW1-671 flange (8X45) bolt is a crucial component designed for Honda marine engine systems. It plays a significant role in securing various engine parts, providing a reliable fastening solution that supports the overall mechanical integrity of the engine. With its flange head, this bolt offers a wider bearing surface to distribute clamping force evenly, enhancing strength and minimizing the risk of loosening during operation. As a genuine Ho