Radiator Cap 7 PSI. Fits Ford 2000, 3000, 4000, 4000SU, 2600, 3600, 4600, 4600SU, 5000, 5100, 5200, 7000, 7100, 7200, 5600, 6600, 7600, 6700, 7700, 5610, 6610, 7610, 6710, 7710, 8000, 9000, 8600, 9600, 8700, 9700, TW5, TW10, TW15, TW20, TW25, TW30, TW35, 2310, 2610, 2810, 2910, 3610, 3910, 4610, 231, 335, 531, 340, 540, 3400, 3500, 445, 4500.