This ARP Fasteners Harmonic Balancer Bolt has a 13/16 inch socket, 1/2 inch-20 thread size and 1.55 inch under head length.

Attention California Residents (Prop 65):
This product can expose you to chemicals Chromium (hexavalent compounds), which is (are) known to the State of California to cause birth defects or other reproductive harm.
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