Made from a356-t61 aluminum alloyper mil-a-21180 class 12 except the elongation shall be 3 percent; mark per ps16001; prepare near side flat surface of counterbore for bonding andgrounding per ps17169, class r; anodize per ps13201 type 11, class ii, color black to match color number 37038 of fed-std-595 after fabrication; install inserts per ps19260; surface roughness of holes ps20018
