Help™ Windshield Wiper Linkage Bushing (49440) by Dorman®. Bushing Inside Diameter: 0.322″; 0.379″. Quantity: 2 Pieces. Drive Link Connecting Bushing. Dorman offers a variety of easily installed Windshield Wiper Linkage Bushings for a range of applications. All Linkage Bushings are constructed of high-quality materials for long-lasting durability.