Bronze aluminum qq-b-679 comp 2, 3.250 in. O/a dia, 1.500 in. O/a h, 2.5000 in. Min to 2.5011 in. Max diameter bore thru, 0.250-16 ns-3a thds 0.630 in. Lg, 12 slots equally spaced 0.156 in. Min to 0.166 in. Max w 0.925 in. Dp, machined surfaces 100.0 microinch finish