OEM, 2 x each Valve Cover Acorn Nut and Sealing Washer for Metric Engines 1967.5 - 1970 R16 (1600 CC) Motors. The Nuts will NOT work on the 1965-1967 1600 SAE threaded motors. Since Engines could have been swapped around from car to car, check your engine Numbers. Metric Engines started around Engine No. 40,000 and up. Numbers are found on the Engine block of the passenger side for left hand drive cars. My Japanese source for the Acorn nuts informed me, 05/2023, they have gone out of production. If accurate, no telling how long inventory will be available in the supply chain. Possibly aftermarket product exisits? The Sealing Washers are No Longer Available at Nissan Dealership Parts Depts. and are getting difficult to track down.
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