Dk-Lok DK-Lok Hex Pipe Plug, GP-4N-SG-S, GP Series, 316/316L Stainless Steel, MNPT, 1/4 Inch Thread Size Get a grip on your piping! With DK-Lok, our hex pipe plugs and fittings offer an attractive finish and secure seal for any workspace. Employers save time and money because all parts are easily... Quick view Qty in Cart: 0 Price: Log in for pricing and quote Subtotal: