"MATL STEEL MIL-S-6758 OR MIL-S-6050 OR MIL-S-5000,CADMIUM AND CHROME PLATED SURFACES,HEAT TREAT 125000 TO 145000 PSI,CYLINDRICAL SHAPE WITH ONEFLANGED END,2.598 IN. OD BY 0.260 IN. W FLANGE,0.876 IN. BODY OD,0.3125 IN. DIA CENTER HOLE BORED O/A LG,0.414 IN. O/A LG,FIVE 0.280 IN. DIA MTG EQUALLY SPACED LOCATED IN FLANGE"