Lincoln Service Parts 2 › Lincoln Electric 9SS31648-1 HEX SOCKET PLUG - 1/8 NPT S31648-1 Lincoln Electric 9SS31648-1 HEX SOCKET PLUG - 1/8 NPT S31648-1 Sale Price: $2.26 Original Price: $2.60 HEX SOCKET PLUG - 1/8 NPT PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! HEX SOCKET PLUG - 1/8 NPT PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1