Aluminum alloy, high strength, ams 4229 except para. 596 seperate test bar acceptable, anodic type ii, class 2, black mil-a-8625, 2.120 in. Nom dia, 0.860 in. Nom h, 0.436 in. Min- 0.444 in. Max bore dia, 4 slots equally spaced on 0.715 in. Radius, 0.900 in. Nom lg, 0.250 in. Nom w