Oil return (oil drain) flange (for GT15 through GT35R) Integral Female 1/2" NPT thread Fits GT25R, GT28R, GT28RS, GT2871R, G3071R, GT3076R, GT30/40, GT35R, GT3082R, GT35/40R **ALSO NOW WORKS WITH T25/T28** Ideal with 45 Degree barbed fitting