Lincoln K and KP Numbers › Lincoln Electric KP4897-1 GUN TUBE INSULATOR / THREAD PROT., FCAW Lincoln Electric KP4897-1 GUN TUBE INSULATOR / THREAD PROT., FCAW Sale Price: $20.46 Original Price: $22.92 GUN TUBE INSULATOR / THREAD PROT., FCAW PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! GUN TUBE INSULATOR / THREAD PROT., FCAW PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000