A foundation for an overhead line mast, power line mast or the like, comprising a reinforced concrete pile including pile threaded bolt connectors: - said reinforced concrete pile defining an elongated structure having a first end part including a planar abutment surface of a first polygonal geometry and a second end part, steel reinforcement elements extending between said first end part and said second end part, said pile threaded bolt connectors being embedded in said reinforced concrete pile and each having an exposed part extending beyond said first end part and positioned in a second polygonal geometry and connected to said steel reinforcement elements of said reinforced concrete pile, said second polygonal geometry being equivalent to said first polygonal geometry, characterized in said foundation further comprising a number of gaskets and a corresponding number of tightening nuts,,,; - each of said exposed parts of said pile threaded bolt connectors having a first portion including a threaded portion, a second portion having a circular cross sectional configuration of a first outer diameter and a transition portion interconnecting said first portion and said second portion, - a first interface being located between said first portion and said transition portion of each of said pile threaded bolt connectors at a first distance from said planar abutment surface, - a second interface being located between said transition portion and said second portion of each of said pile threaded bolt connectors at a second distance from said planar abutment surface, said first distance d1 being larger than said second distance, - each of said gaskets having an annual shape defining a second inner diameter and second outer diameter, - said tightening nuts,,, having a first end surface, a second end surface and a central aperture including a tapered portion at said second surface end for providing a larger opening compared to said central aperture, said central aperture further including an internal threaded portion at said first end surface complimenting said threaded portion of said pile threaded bolt connectors, - said second inner diameter of said gasket being congruent to said first outer diameter of each of said second portions of each of said pile threaded bolt connectors 30 and said second outer diameter being larger than said inner diameter of said internal threaded part of said tightening nuts,,,, - said tightening nuts,,, being configured to be rotated relative to said threaded portion of said pile threaded bolt connectors for allowing said gaskets to be compressed towards said pile threaded bolt connectors, said tapered portion of said tightening nuts,,, and said planar abutment surface for providing sealing relative to said pile threaded bolt connectors and said planar abutment surface. - said reinforced concrete pile defining an elongated structure having a first end part including a planar abutment surface of a first polygonal geometry and a second end part, steel reinforcement elements extending between said first end part and said second end part, said pile threaded bolt connectors being embedded in said reinforced concrete pile and each having an exposed part extending beyond said first end part and positioned in a second polygonal geometry and connected to said steel reinforcement elements of said reinforced concrete pile, said second polygonal geometry being equivalent to said first polygonal geometry, characterized in said foundation further comprising a number of gaskets and a corresponding number of tightening nuts,,,; - each of said exposed parts of said pile threaded bolt connectors having a first portion including a threaded portion, a second portion having a circular cross sectional configuration of a first outer diameter and a transition portion interconnecting said first portion and said second portion, - a first interface being located between said first portion and said transition portion of each of said pile threaded bolt connectors at a first distance from said planar abutment surface, - a second interface being located between said transition portion and said second portion of each of said pile threaded bolt connectors at a second distance from said planar abutment surface, said first distance d1 being larger than said second distance, - each of said gaskets having an annual shape defining a second inner diameter and second outer diameter, - said tightening nuts,,, having a first end surface, a second end surface and a central aperture including a tapered portion at said second surface end for providing a larger opening compared to said central aperture, said central aperture further including an internal threaded portion at said first end surface complimenting said threaded portion of said pile threaded bolt connectors, - said second inner diameter of said gasket being congruent to said first outer diameter of each of said second portions of each of said pile threaded bolt connectors 30 and said second outer diameter being larger than said inner diameter of said internal threaded part of said tightening nuts,,,, - said tightening nuts,,, being configured to be rotated relative to said threaded portion of said pile threaded bolt connectors for allowing said gaskets to be compressed towards said pile threaded bolt connectors, said tapered portion of said tightening nuts,,, and said planar abutment surface for providing sealing relative to said pile threaded bolt connectors and said planar abutment surface.