Lincoln Service Parts 1 › Lincoln Electric 9SM20517-6 NYLON SOCKET SET SCREW M20517-6 Lincoln Electric 9SM20517-6 NYLON SOCKET SET SCREW M20517-6 Sale Price: $5.17 Original Price: $5.94 NYLON SOCKET SET SCREW PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! NYLON SOCKET SET SCREW PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1