Thread must be sealed accordingly using thread sealing thread, Teflon tape or hemp SRGDRR Brass Hex Bushing Reducer Pipe Fitting 1/8, 1/4, 3 Brass Reducer Fitting 1/2 Inch Female To 3/8 Inch Male Brass Reducer Adapter 3/8 Male To 1/4 Female Reducer 3/8 x 1/4 Brass Compression Reducer Adapter, Lead-Free. For aluminum, copper, and plastic tubing with 200 PSI rating With hexagonal key surface Brass Reducer, 3-4 Mm at ₹ 40/piece in Chennai | ID: 18949870312 Tecuro br reducer – with hexagonal key surface design: 3/8 inch x 1/4 inch (external thread G x internal thread Rp) material: blank br, CW617N, according to drinking water regulation 50930-6, hot-pressed external thread, cylindrical (G) according to standard DIN ISO 228-1, internal thread, cylindrical (Rp) according to standard ISO 7/1., DIN EN 10226-1 or DIN ISO 228-1., With hexagonal key surface thread must be sealed accordingly using thread sealing thread, Teflon tape or hemp