Stauff SPAL 6063.5 PP H DPAL AS M W12 Thermostaten Blanking Screw for Ports M42x2 blank filter Element Blanking Screw for Ports M42x2 Thread Reducer Thread1: BSPP Male R3 4 Thread2: BSPP Female R1 1 2 Steel 5mm Polypropylene W12 Weld Plate Cover Plate Hex Head Bolt Smooth without Initial Tension