90005-PT0-003 Bolt-Washer (12x163) - Overview. The 90005-PT0-003 Bolt-Washer (12x163) is an essential component designed to support Honda marine engine systems. Serving as a critical fastener, this bolt-washer assembly ensures secure and stable mounting of engine parts, maintaining the reliability and smooth operation of your marine equipment. Engineered to exact factory specifications, it guarantees seamless integration with existing parts, contributing to overall system performance and durabil