"NSN USED TO PURCHASE A MINIMUM OF 3 CONTAINERS TO A MAXIMUM OF 7 CONTAINERS;CERTIFICATION OS 8293,OS 10602,GE B50TF40 CLASS 1,PWA 1315,BOEING BMS 10-67 (TYPE 6) AND GENERAL MTRS EMS 56760,RR 9507/8;RB 90-95 HARDNESS;3000 PSI MINIMUM STRENGTH;EASILY MACHINED WITH ALL GRADES OF CUTTING TOOLS"