Unistrut Service Company offers the resources you need to take your project from the drawing board to successful completion. To ensure maximum durability and quality, Unistrut fittings are made from hot-rolled, pickled and oiled steel plates, bar, strip or coil. All fittings meet or exceed physical properties of ASTM A1011 GR 33. The pickling of the steel produces a smooth surface free from scales. Product dimensions are 1 5/8" wide x 1 5/8" tall x 12 ga. thick. Slots are sized for a 1/2" Threaded Rod or Fastener.