Shimano FD-M8020-D Front Derailleur Clamp Bolt Description: The FD-M8020-D Front Derailleur Clamp Bolt is designed to attach select Shimano high direct mount, side swing front derailleurs directly to the frame. The bolt includes a washer so the bolt can be properly torqued down for safety and performance. Features: Bolt for securing select Shimano side swing front derailleurs that have a D-Type, or high direct mount, clamp design See compatibility tab for a list of compatible derailleurs Specifications: Bolt Size: M6 x 16mm (Length)