Bolt sealing gasket

The utility model provides a bolt sealing gasket which comprises an annular flat gasket made of elastic materials, and the inner diameter of the annular flat gasket is larger than the aperture of a mounting hole and smaller than the outer diameter of the annular flat gasket. When the sealing gasket in the scheme is actually used, along with fastening of a bolt, the inner ring of the annular flat gasket can be extruded to enter the mounting hole and extend into the mounting hole, the outer ring of the annular flat gasket can form radial sealing, and the two-way sealing plays a better protection role. 本实用新型提供一种螺栓密封垫，包括弹性材料制成的环形扁垫，环形扁垫的内径＜安装孔孔径＜环形扁垫的外径。上述方案中的密封垫实际使用时，随着螺栓的紧固，环形扁垫的内圈便会受到挤压进入往安装孔内部延伸，环形扁垫的外圈便会形成一道径向密封，双向密封起到更好的防护作用。