The weld-on mount is coped for 1" diameter tubing

Parkerized lifter base screws with locking washers are duplicates of stock Harley-Davidson fasteners used on Big Twin 1936-53 and Harley-Davidson 45's 1937-73

Parkerized OEM# 4730-30A wire clip used on seat post tube

Size 10 BHC-859 8 x 1/2 10 BHC-825 8 x 3/4 10 BHC-826 8 x 1 10 BHC-828 10 x 1/2 10 BHC-830 10 x 3/4 10 BHC-832 10 x 1 10 BHC-834 1/4 x 1/2 10 BHC-835 1/4 x 3/4 10 BHC-836 1/4 x 1 10 BHC-837 5/16 x 1/2 10 BHC-838 5/16 x 3/4 10 BHC-841 5/16 x 1 10 BHC-843 5/16 x 1-1/4 10 BHC-844 5/16 x 1-1/2 10 BHC-845 5/16 x 1-3/4 10 BHC-846 3/8 x 3/4 10 BHC-849 3/8 x 1 10 BHC-850 3/8 x 1-1/4 10 BHC-851 3/8 x 1-1/2 10 BHC-852 3/8 x 1-3/4 10 BHC-853 3/8 x 2 10 BHC-854 3/8 x 2-1/4 10 BHC-855 3/8 x 2-1/2 10 BHC-856 3/8 x 3

OEM# 63607-54

530 Series O-Ring Replacement Rivet Style Master Link - Chrome Fork Tube Diameter_41MM The weld-on mount is copedThis is a replacement 530 Series O Ring replacement rivet style master link for Drag Specialties brand chains. These replacement master links are available in a standard raw chain finish as well as chrome to match chrome plated Drag Specialties brand chains. It never hurts to have a spare master link in your tool bag! Note: This O Ring chain requires a rivet tool to install the master link.