DeWalt 5170026-57 Screw For JS20 JS10 Jigsaw

5170026-57 is a genuine replacement Screw (specifically a hex screw in some contexts) used in handheld woodworking tools It is a standard fastening component designed to hold structural or functional parts of a tool together. 
Tool Compatibility
TJigsaws: Compatible with the Black & Decker JS20 (Type 1) and JS10 (Type 1).