6material tungsten; o/a dim.; lg 0.310 to 0.320 in., w 0.097 to 0.103 in.; 1 ea hole 0.061 to 0.066 in. Dia; right and left top edges chamfered at a 45 degrees angle to dp 0.010 to 0.020 in. ; distance between chamfered edges topedge 0.083 to 0.093 in.