OMC Evinrude Johnson Screw

The OMC Evinrude Johnson Screw 357884 is an OEM (Original Equipment Manufacturer) factory boat part. It is an M8 x 35 screw. 

Based on the search results, it appears to be used in various applications within OMC (Outboard Marine Corporation) engines, specifically Evinrude and Johnson outboards. It's likely a versatile screw used for general fastening within different engine components. The specific location or assembly where it's used isn't detailed in the search results. 

You can find this screw available for purchase online from sellers specializing in boat parts. For instance, it's listed on eBay as "C24 Johnson Evinrude OMC 357884 Screw (M8 x 35) OEM New Factory Boat Parts". 

If you need a replacement or want to confirm the specific location where this screw is used in your engine, consulting a parts diagram for your specific engine model would be the most accurate approach. You can usually find these diagrams in your engine's service manual or on websites specializing in marine engine parts.