"ALUMINUM ALLOY,QQ-A-250/13,TEMPER T6; EPOXY PRIMER,MMS 425; 0.231 IN. MAX H; 0.452 IN. MAX W; 3 SLOTS 0.255 IN. NOM LG,0.224 IN. NOM W LOCATED IN BASE OF CHANNEL ON A 2.375 IN. RADIUS; 3 SLOTS 0.070 IN. NOM W; 0.200 IN. NOM LG LOCATED IN BOTH SIDES OF CHANNEL ABOVE SLOTS IN BASE; 1.250 IN. SPACING BETWEEN NUTS"