ARISTARCO disc wash arm support

This disc is mounted on the wash arms of Aristarco dishwashing machines, the following models:

AE 35.21, AE 40.29, AE 45.30, AE 50.32, AE 50.35, AE 50.35 H, AL 55.45 EM/P, AP 38.25, AP 38.25 D.A., AP 40.28, AP 40.28 D.A., AP 40.29, AP 40.29 D.A., AP 40.31, AP 40.31 D.A., AP 45.30, AP 45.30 D.A., AP 50.32, AP 50.32 D.A., AP 50.35, AP 50.35 D.A., AP 55.40, AP 55.40 D.A., PASSPORT 45.30, AL 40.28, AL 40.28 E, AL 40.28 EM, AL 45.32, AL 45.32 E, AL 45.32 EM, AL 50.34, AL 50.34 E, AL 50.34 EM, AL 50.40, AL 50.40 E, AL 50.40 EM, AL 55.45, AL 55.45 E, AL 55.45 E/P, AL 55.45 EM, ALISEO 40.28 E, ALISEO 45.32 E, AS 40.31, AS 40.31 D.A., AS 40.31DGT, AS 40.31DGT-D.A., AS 40.31E, AS 40.31E-DA, AS 50.35, AS 50.35 D.A., AS 50.35 DGT, AS 50.35DGT-DA, AS 50.35E, AS 50.35E-DA, AS 55.40, AS 55.40 D.A., AS 55.40 DGT, AS 55.40DGT-DA, AS 55.40E, AS 55.40E-DA, AU-L 55.45, AU-L 55.45E, AU-P 55.40, AU-S 55.40, AU-S 55.40 DGT, AU-S 55.40E,  LPC 1500, AP 1000