94111-05800 Spring (5mm) Washer - Overview. The 94111-05800 Spring (5mm) Washer is a vital component used in Honda marine engine systems. This spring washer functions within the fastening system to provide spring tension that helps prevent loosening caused by vibration or mechanical stress, thereby maintaining the integrity and performance of the engine assembly. Its specific design ensures a seamless fit with existing hardware, sealing, and housings, which is critical for sustaining reliable me