Al special shape per 819-1048-010; chem film type ii, grade c, class 3 per mil-c-5541, 580-0036-000; 1.456 porm 0.005 in. Lg; 0.312 in. W; 0.459 in. Ht; rounded top has 0.156 in. R; two holes one at each end 0.1905 porm 0.0005 in. Dia, 0.340 dp, surface finish of 63 uin or better to 0.14 dp, centers 0.303 porm 0.005 in. From bottom concentric with rounded top; two no. 4-40 unc-2b x 0.125 dp holes, 0.246 porm 0.004 in. From ends, 0.964 porm 0.004 in. Between centers; 90 degrees turn from line of centers one no. 4-40 unc-2b x 0.18 in. Dp hole, 0.73 in. From one end, 0.18 in. From bottom