Lincoln Service Parts 1 › Lincoln Electric 9SFC0806012020 KEY SQUARE 6MM FC0806012020 Lincoln Electric 9SFC0806012020 KEY SQUARE 6MM FC0806012020 Sale Price: $2.89 Original Price: $3.32 KEY SQUARE 6MM PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! KEY SQUARE 6MM PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1