Cast Iron Piston Ring, 7.00 Inch OD, 0.249 Inch Width, 0.24 Inch Wall Thickness

Groove depth needs to be at least 0.015 inches deeper than the maximum radial wall thickness of the ring, with a tolerance of plus 0.003, minus nothing. That extra depth keeps the ring from bottoming out in the groove once it gets compressed down to working diameter. On the width side, cut the groove at least 0.001 inches wider than the maximum ring width, same tolerance of plus 0.003, minus nothing. That gives the ring enough room to slide freely without binding up during operation.

The key dimensions on this ring are a 7.00 inch outside diameter and a 0.249 inch width. It is a cast iron piston ring, sold under SKU SPR-7002, with alternate part number C1GG42.