Used on control unit. 1.9686" overall width 1.7715" bore diameter type 134, class 2, cartridge b, phenolic retainer/inpair 90a universal ground faces, counterbored outer ring, non-separable
Used on howitzer 155 mm, m-198. 88.9000" bore diameter oil hole & groove inner nickel all external/exposed metal surfaces surface treated cam roller, hardened