Lincoln K and KP Numbers › Lincoln Electric KP4523-1-50F NOZZLE 500A, THREAD-ON, FLUSH 1/2 ID Lincoln Electric KP4523-1-50F NOZZLE 500A, THREAD-ON, FLUSH 1/2 ID Sale Price: $22.29 Original Price: $24.97 NOZZLE 500A, THREAD-ON, FLUSH 1/2 ID PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! NOZZLE 500A, THREAD-ON, FLUSH 1/2 ID PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000