"NSN USED TO PURCHASE A MINIMUM OF 40CONTAINRS TO A MAXIMUM OF 79CONTAINERS;CERTIFICATION PWA 1307, GE B50TF137 CLASS B AND RR 9507/2;RC 35-40 HARDNESS;3000 PSI MINIMUM STRENGTH;BEST FINISH BY WET SANDING;MIXTURE OF 75%CRYSTALLINE CHROMIUM CARBIDE AND 25% NICKEL CHROMIUM ALLOY POWDERS. COATINGS FOR 1000-1500 DEG (F) FOR RESISTANCE TO ABRASIVE AND FRETTING TYPE WEARS.COATINGS ARE HARD,DENSE AND TIGHTLY ADHERENT"