Countersunk Bolts

Suitable holes for countersunk bolts may be produced by direct plasma arc cutting using an orbital tool post, by piercing or gouging a straight hole and welding a pre-machined insert in place, or by a combination of direct drilling or gouging.
The minimum recommended bolt size is 9.5mm (38″) diameter and the number and spacing required will depend upon the size and shape of the plate.
The finished counter sunk hole should allow the flat headed bolt to sit approximately 4mm below the surface of the plate. It can be protected from abrasion by ‘capping’ with a suitable Triten Armalloy tubular hardfacing electrode.