Bolt Length (mm): 60 Bolt Type: Hex Head Coating: Zinc Flake Grip Length (mm): 7.5 Thread: Coarse Head Height (mm): 12.88 Thread Size (mm): M20 Hole Thread Pitch: 2.50 Thread Size (dia x pitch) (mm): M20 x 2.50 Drive (mm): 30 Finish: Zinc Flake Total Bolt Length - 3 (mm): 60 Bolt Size (mm): M20 Head Width - 5 (mm): 30 Head Height - 4 (mm): 13 Grip Length - 2 (mm): 14 Grade: 10.9 Material ISO 898-1 Class 10.9 Finish Notes: Caterpillar is changing from Zinc Plating to a Zinc Flake finish for many bolts. The new coating improves corrosion protection to 720 hours. Until stock of the current plating is depleted, you may receive either finish due to the exhaust process. Overall Length (mm): 60 Color Notes: Bolts sizes M6 through M12 with the new Zinc Flake finish will be black. Bolts sizes M14 through M36 with the new Zinc Flake finish will be gray. Until stock of the current finish is depleted, you may receive either the current or new bolt color.