"STEEL,MIL-S-7420,DIM.,0.160 IN. NOM OD,0.0655 IN. MIN,0.0700 IN. MAX ID0.057 IN. MIN,0.058 IN. MAX THICK,ID COUNTERBORED TO 0.093 IN. DIA BY 0.025IN. DEEP,MAX SURFACE FINISH,LEFT FACE 4 MICROINCHES RMS OR BETTER,RIGHT FACECOUNTERBORED SIDE,20 MICROINCHES AA,FACES PARALLEL WITHIN 0.001 TIR"