It is recommended to use luer slip syringe (not luer lok) for the Swinnex 47 SX0004700, as it fits inside the inlet. No additional adapter is required. Additionally, the Swinnex 47 has a ¼ NPTM inlet, which includes the female luer slip interior.
Here are examples of syringes that are compatible with the Swinnex 47 and their sample holding capacities:
Z683590-100EA: Polypropylene LUER SLIP syringe, 10 ml, pack of 100
XX1102012: 20mL Luer slip polypropylene syringe, pack of 12
XX1105005: 50mL Luer slip polypropylene syringe, pack of 5