High-Temperature Flangeless PlugsNatural silicone rubber temperature 250 degreesUsed to cover holes exposed to the surrounding environmentConical rings and hollow structures are suitable for coveringA variety of different sizes of holesThe pull-out adjuster makes installation and removal easier Number Metric Thread American Thread Inch Thread d1 (mm) D (mm) h (mm) GWZS001 M6 1/4 - 4 6 25.4 GWZS002 M8