Lincoln Service Parts 2 › Lincoln Electric 9SS18438 THUMB SCREW S18438 Lincoln Electric 9SS18438 THUMB SCREW S18438 Sale Price: $33.26 Original Price: $38.25 THUMB SCREW PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! THUMB SCREW PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1