"NICKEL,CHROMIUM-IRON-ALLOY,MIL-N-6840,CONDITION A,6.840 IN. MIN,6.880 IN. MAX LG,2.320 IN. MIN,2.360 IN. MAX W,WITH STRAIGHT SIDES,ROUNDED ENDS,OPENING 6.506 IN. MIN,6.516 IN. MAX LG,1.400 IN. W ACROSSCENTER OF OPENING,0.400 IN. MIN,0.405 IN. MAX RADIUS ON ENDS OF OPENING"