New OEM Genuine Nissan harmonic balancer bolt for the crankshaft. This crank bolt will fit 1970-83 Datsun 240Z, 260Z, 280Z and 280ZX. Also fits 510 68-73. The factory service manual torque spec for this bolt is 100 lb ft.
*See PT# 800-1984 for longer bolt for aftermarket balancers