Used on stryker m8-light armored vehicle. 0.256" inside diameter external ring style black phosphate steel external retaining ring thickness 0.025"; black phosphate surface treated
2.440" inside diameter 2.546" outside diameter 0.046" major thickness special flat ring style medium duty internal ring retaining spiral cadmium surface treated
Used on 53nuh-1y helicopter; c4n helicopter; h1 all versions. 4.875" inside diameter 5.055" outside diameter 0.072" major thickness special flat ring style navy-ring, retaining