Screw set with washers for timing cover + crankcase / sump, suit Norton twins, 1949 to 1956, ZP. The parts book somtimes lists washers for all screws but they were only used on the sump as the timing cover has a gasket. Original part numbers 3689; A2/36; E6980 - crankcase timing cover screws (short) x 5; A3/93; 10940 - timing cover screws (long) x 6; A3/93; 10940 - crankcase screws (long) x 2; 3909; A2/722; B2/613; 11775 ; 000203 - crankcase washers x 2;