Lincoln Electric 9SS31643-3 S31643-3 NYLON LOCKNUT, 1" NPT Sale Price: $3.10 Original Price: $3.56 NYLON LOCKNUT, 1" NPT PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Quantity: Add To Cart Added! NYLON LOCKNUT, 1" NPT PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1