"ALUMINUM ALLOY 6061-T6,QQ-A-225/8,0.555 IN. MIN,0.575 IN. MAX ID,0.677 IN. MIN,0.697 IN. MAX DISTANCE ACROSS FLATS,WRENCHING FACILITYHEXAGONAL,THREADED INTERANL 9/16-18 UNF-3B PER MIL-S-7742,0.050 IN. MIN,0.070 IN. MAX HOLE CENTERED ON TOP OF CAP,THREE 0.042 IN. MIN,0.052 IN.MAX LOCKING WIRE HOLES EQUALLY SPACED AROUND PERIPHERY,ANODIZE PERMIL-S-8625 TYPE 2 CLASS 2 DYED BLACK,0.380 IN. MIN,0.400 IN. MAX L"