U Bolts , Square U Bolts, U Clamps Size: Normal Dia : ΒΌ" to 4" 6-100 mm Length : As Specified by user or Upto any Length. Specification Standard:DIN ASME BS BS EN ISO ASTM . Material:Mild Steel, Alloy Steel, Carbon Steel, Ferritic & Austenitic Stainless Steel . Threads:UNC, 8UN, UNF, Metric Coarse & Fine Series. Surface Finish:Plain,Zinc Plated , Hot Dip Galvanized, P.T.F.E. Coated.