Federal supply schedule, FSC group. 25. Vehicular equipment components, FSC class 2520, Brake lining and clutch facings (metallic), FSC class 2530, Brake band lining (nonmetallic) and brakeshoes, bonded or riveted-lined, FSC class 2540, Tire chains, truck floor mats, and seat belts, FSC class 2990, Engine preheaters, FSC class 4330, Oil filter elements, full-flow and bypass, Nov. 1, 1960-Oct. 31, 1961; prepared by National Buying Division.