"GAGE,GO NO-GO,STAGE 1 SHROUD;ITEM CONSISTS OF A FLAT STAINLESS STEEL STRIP WITH A 0.0580 IN. DIA. CARBIDE GAGE PIN BRAZED ON ONE END AND A 0.0600 IN. DIA. PIN ON THE OTHER;GAGE FIT INTO THE DIMPLED AREAS OF THE AFT AND FORWARD RAIL GROOVES;THE 0.0580 DIA. PIN MUST FIT AND THE 0.0600 IN. DIA. PIN MUST NOT FIT FOR AN ACCEPTABLE CONDITION;USED ON J85-GE-2121A"