Holding Down Bolts also known as Foundation Bolts.
Grade 8.8 BS 7419.
Used for bolting down steelwork frames to concrete bases.
Supplied with Nuts.
Conical Bolt Cones are manufactured from waxed cardboard. When used with a holding down bolt it will provide a conical void for easy bolt location adjustment, with minimum displacement of reinforced concrete.
They can be reused by leaving 25mm of the box protruding and rotating them before the concrete is completely set. Applications include fixing stantion and machine bases.
Bolt Cone length = Holding Down Bolt Length less 75mm approx.