Do I need to use an outdoor or wet electrical box for garage sink area?
If the outlet is not being splashed you can use a standard box with knockouts, also a standard outlet. This would be Similar to a kitchen or bar. If the outlet is within 6' of the sink it will need to be a GFCI or GFCI protected within 6' of the sink. Indoors water tight fittings are not needed. For example is the area finished with sheetrock? If the sheet rock is ok it is not a damp /wet area as it will fall apart quickly being in a damp / wet area. FWIW All garage outlets need to be GFCI protected by current code.