... cone-shapped nutDescriptiion:Material:carbon steelAssemble:washer,hex nut,plastic ring,thread rod bolt,shellCoating:Cr6 zinc/ ... Cr3 zinc,3-5 micron,white or yellowShell type:all type of hole on shell are available.Applications: ... diameter of the cone.A washer and flange nut are then assembled on the stud to ... a true expansion principle:Tightening of the flange nut pulls the cone-shaped stud end into the ...