"STEEL,ASTM A-322 GRADE 4340,ROCKWELL C 45-50 HARDNESS,MIN YIELD STRENGTH 125000 PSI,MIN TENSILE STRENGTH 140000 PSI,O/A LG 16.120 IN.,O/A DIA 3.995 TO 3.997 IN.,DOUBLE HELICAL GROOVES ALONG LG ON ONE IN. PITCH 1.120 IN. FROM EA END,8 STRAIGHT GROOVES,BOTH ENDS CHAMFERED 0.250 IN. X 45 DEG,125 MICROINCH FINISH O/A EXCEPT 250 MICROINCH FINISH AT BOTH ENDS AND 32 MICROINCH FINISH ON DIA AS NOTED,2 EXTERNAL RETAING RINGS INCL 1 AT EA END"