This 5 1/2" clutch disc fits our Tilton OT-III 5 1/2" Single Disc Clutch (Part No. 173-60). The 1" x 24 spline pattern was used on some early Nissan models, including the 240Z through 300ZX.
Tilton's minimum recommended clutch disc thickness is 0.074" in single-disc clutches. New clutch discs measure 0.104" thick.
Note: Honda and later Nissans also used 1"x24 splines, but with different spline shapes. The different shapes are not interchangeable.