Home / Lawn & Garden / Parts / Line Trimmer Flange Bolt 669-6557 Line Trimmer Flange Bolt 669-6557Price Not Available Price may not be up-to-date. Out of Stock View Product Part Number: 669-6557 Brand: HITACHI POWER TOOLS Seller: Sears PartsDirect Categories: Lawn & Garden, Parts Possible Matches$10.99BlueStars 669-18-30 Racing CVT Drive Belt - Fits for 49cc 50cc GY6 ... Description This flange bolt (part number 669-6557) is for line trimmers. Follow appropriate safety practices when installing flange bolt 669-6557.