Yes! All universal joint flanges are designed for metric bolts, except for the LS (Light Duty SAE Flange Series), to be interchangeable with other suppliers: GWB, Voith, Johnson Power, Cline, All Power, UniFlex, Traction and others use metric flanges. Dana Spicer is similar to our LS Series. Ameridrives also uses inch standard bolt patterns, holes, etc. which makes their design a bit of an oddball in the industry. We can also modify our standard flanges to mate to non-standard bolts patterns or even to mate with existing gear coupling rigids.