Lincoln Service Parts 2 › Lincoln Electric 9SS31139 COVER PLUG [5] S31139 Lincoln Electric 9SS31139 COVER PLUG [5] S31139 Sale Price: $8.78 Original Price: $10.10 COVER PLUG [5] PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 5 Add To Cart Added! COVER PLUG [5] PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 5