Lincoln Electric 9SS31643-2 S31643-2 NYLON LOCKNUT, 3/4" NPT Sale Price: $1.63 Original Price: $1.87 NYLON LOCKNUT, 3/4" NPT PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Quantity: Add To Cart Added! NYLON LOCKNUT, 3/4" NPT PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1