94101-05000 Washer Plain (5Mm) - Overview. The 94101-05000 Washer Plain (5Mm) is a standard flat metal washer designed for use within Honda marine engine systems. It serves a vital mechanical function by distributing the load from fasteners such as bolts and screws, which helps prevent damage to mounting surfaces and maintains secure connections. This plain washer supports the rigging and accessory system by providing stability and durability, ensuring reliable equipment operation during marine