92101-06025-4J Hex (6X25) Bolt - Overview. The 92101-06025-4J Hex (6X25) Bolt is a genuine OEM fastener designed specifically for Honda marine engine systems. This hex head bolt, measuring 6mm in diameter and 25mm in length, plays a critical role in securely fastening various engine components to maintain structural integrity and overall system reliability. Crafted to exact factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability