matl-alum alloy 356-T6 per qq-a-601, C0mp 3; tee shape fitting 7.58 in. lg; 1st end internally sholdered 3.509 in. id; 2nd end 0.69 in. id-2.20 in. from 1st end; 3rd end sholdered connection 3.308 in. od; flange 1.58 in. from 3rd end, 4.88 in. od w/12 places for 0.156 in. rivets