Nominal size (mm): 4,8x21,0. Clamping range (mm): 8,0-15,0. l (mm): 21. Ø d (mm): 4,8. Ø dk (mm): 11. Ø dm: 2,8. K (mm): 1,5. Hole Ø (mm): 5.15 (+0.1). Read more.