Lincoln Service Parts 2 › Lincoln Electric 9ST14557-50 ADAPTER, 1/4 NPT TO 3/8 FNPT T14557-50 Lincoln Electric 9ST14557-50 ADAPTER, 1/4 NPT TO 3/8 FNPT T14557-50 Sale Price: $15.12 Original Price: $17.39 ADAPTER, 1/4 NPT TO 3/8 FNPT PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! ADAPTER, 1/4 NPT TO 3/8 FNPT PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1