Adjustable clamp incorporating a setscrew tail to accommodate a wide range of flange thicknesses. The type D2 has a recessed head to hold the bolt head captive. The skirt prevents the clamp rotating during installation. Suitable for flanges up to 5 degrees. This clamp has an adjustable Setscrew Tail that can be adapted to fit a range of flange thicknesses. Recessed top holds the bolt head captive while the nut is tightened. Type W washer can be used to fill the recess.