Size: M12 to M63 Material: Free Cutting Brass Application: Stop Plug used to close thread entries or means of sealing & stopping unused thread entries in flame proof enclosures . Treatment: Also avilable in nickle plated brass. Accessories: Thread Seal or O "Ring". Size Thread Thread Length L Total Height H ROD Dia D M 12 M 12X1.5 12.00 15.00 16.00 M 16 M 16X1.5 12.00 15.00 20.00 M 20 M 20X1.5 12.00 15.00 25.00 M 25 M 25X1.5 15.00 18.50 30.00 M 32 M 32X1.5 15.00 19.00 36.00 M 40 M 40X1.5 15.00 19.00 45.00 M 50 M 50X1.5 15.00 20.00 55.00 M 63 M 63X1.5 15.00 20.00 68.00 M 75 M 75X1.5 15.00 20.00 80.00