Lincoln K and KP Numbers › Lincoln Electric KP2743-1-38R NOZZLE 550A, THREAD-ON, 1/8R, 3/8 ID Lincoln Electric KP2743-1-38R NOZZLE 550A, THREAD-ON, 1/8R, 3/8 ID Sale Price: $38.02 Original Price: $42.58 NOZZLE 550A, THREAD-ON, 1/8R, 3/8 ID PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000 Add To Cart Added! NOZZLE 550A, THREAD-ON, 1/8R, 3/8 ID PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1.000