Lincoln Service Parts 2 › Lincoln Electric 9ST14557-55 3/8 X 3/8 NPT NIPPLE T14557-55 Lincoln Electric 9ST14557-55 3/8 X 3/8 NPT NIPPLE T14557-55 Sale Price: $12.35 Original Price: $14.20 3/8 X 3/8 NPT NIPPLE PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! 3/8 X 3/8 NPT NIPPLE PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1