Lincoln K and KP Numbers › Lincoln Electric KP2743-1-75S NOZZLE 550, THREAD-ON, 1/8SO 3/4 ID Lincoln Electric KP2743-1-75S NOZZLE 550, THREAD-ON, 1/8SO 3/4 ID Sale Price: $37.04 Original Price: $41.49 NOZZLE 550, THREAD-ON, 1/8SO 3/4 ID PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! NOZZLE 550, THREAD-ON, 1/8SO 3/4 ID PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000