DIN 18182 trumpet head dry wall screw for gypsum plasterboards. TN = cone end, TB = drilling end. Type D = double-start fine thread, Type E = single-start coarse thread, type B = tapping screw coarse thread, type F = tapping screw fine thread - CISO TRADE | Purchase full range and sizes of fasteners, fittings, bearings, hoses, pipes, valves, pumps, pneumatic & hydraulic components, seals easily one-stop!