●✔#1 INDUSTRIAL SOLUTION: Purlin Clamp is Ideal for Suspending Pipes from Side of Beam, as well as for Various Building, Marine, Automobile, Plumbing, and Industrial Applications. ●✔REDUCED LABOR COST: Ultra-Secure Mounting without Welding and Drilling; Takes Seconds to Install or Remove ●✔SPECIFICATIONS: Fits 3/8 Threaded Rod; Max Load 400 lbs.; Weight .82 lb.; Designed for Large-Lip Rolled Steel Purlins ●✔SUPERIOR QUALITY: Ultra Heavy Duty Uncoated Malleable Iron Beam Clamps; Highly Durable; Rust Resistant; Corrosion Resistant; Outstanding Performance in Both Indoor and Outdoor Applications; Meets or Exceeds Industry Standards ●✔APPROVALS: FM; UL; Federal Specifications WW-H-171E & A-A-1192A Type 23; MSS ANSI/SP-69 & SP-58 Type 23