Lincoln K and KP Numbers › Lincoln Electric KP2743-1-75F NOZZLE 550, THREAD-ON, FLUSH 3/4 ID Lincoln Electric KP2743-1-75F NOZZLE 550, THREAD-ON, FLUSH 3/4 ID Sale Price: $35.92 Original Price: $40.23 NOZZLE 550, THREAD-ON, FLUSH 3/4 ID PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! NOZZLE 550, THREAD-ON, FLUSH 3/4 ID PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000