Beam Clamp, Standard Duty, Max. Load (Lb.) 1000, Material Carbon Steel, Width (In.) 8, Bolt Size (In.) 3/8, Beam Width 8 In., Metal Detectable Yes, Clamp Center Load On Beam To Prevent Distortion., Galvanized Finish, Standards A-A-1192A (Type 21), Ww-H-171-E (Type 21), Ansi/Mss Sp-69, And Ansi/Mss Sp-58 (Type 21). Ul Listed When Used With 3/8 In. And 1/2 In. Rod.