M8 x 70 Allen Screw. This Screw holds the main clutch cover to the crankcase on Rotax DD2 kart engines.
Note that (4) of these bolts are utilized to secure the clutch cover and support plate to the crankcase of the Rotax DD2 (only one is pictured in diagram, but 4 are required).
Each Screw is M8 x 1.25 thread in sizing, and will take a 6mm allen key to adjust.