Nitralloy, mil-s-6709, phosphate coat per mil-c-490 grade 1, rockwell c 34-38 core hardness, nitride all over to rockwell 15n 0.003 in.Min, 0.006 in. Max effective case depth 0.0003 max white layer, 0.380 in.0.400 in. O/a lg, 0.246 in. Min, 0.248 in. Max dia, 0.206 in. Min, 0.210 in.Max by 0.22 in. Min, 0.24 in. Max deep large id, 0.199 in. Min, 0.200 in.Max small od
