The planar (F) contacts are prone to surface roughness and stamping marks. (It is recommended to adjust the planar contacts to a large arc surface with a radius of around R40 to avoid stamping marks and make the surface smoother.) Considering the bonding strength between silver and copper and the processing difficulty, we strongly recommend that the ratio of the head diameter D to the shank diameter d dari paku keling harus menjadi nilai standar yang tercantum dalam katalog .
