HW-340 Malleable Iron Wedge Inserts

HW-340 Malleable Iron Wedge Inserts are embedded into concrete slabs to allow for secure and adjustable attachment of materials to a concrete structure.


Shear Tension Concrete Strength Torque
HW-340 16,650 lbs. 13,093 lbs. 4,125 psi 150 ft./lbs.


Askew Head Bolt

  • 3/4” dia. x 2”, 2-1/2”, 3” or 4” long.
  • Available Plain, Stainless Steel or Zinc Plated. Hot Galv available on special order.
  • Askew Head Bolt Performance Data:Carbon Steel
    Carbon Steel 60,000 psi minimum Tensile Strength
    Stainless Steel 70,000 psi minimum Tensile Strength

HW-340 Malleable Iron Wedge Inserts Submittal

Askew Head Bolt Submittal


  • HW-340 Standard Wedge Insert must be installed at least 1-1/2″ from bottom of slab
  • Nail holes in the back of the insert allow easy nailing to forms
  • When the forms are stripped, the open face of the insert is flush with the concrete
  • The beveled head of the askew head bolt engages the internal wedge shape of the insert and produces an automatic tightening action when a load is placed on it