1999 Toyota Camry

I am a toyota tech and I dont remember see any phillip head screw or bolt on the water pump. Only 10 mm head bolts aroud the timing belt cover ( 8 ) and 3 bolts also 10 mm heads holding the water pump, 2 nuts holding a pipe and another 2 nuts for thrmostat housing, and a 12 mm head holding a bracket for the alternator. 3, 14mm bolts for motor mount bracket, 3 more for dog bone and a 19 mm for balancer pulley. No phillps head anywhere. Help? Good luck