ProX T-C4SH Aluminum Pro O-Clamp with Big Wing Knob for 1.5-2.0 inch Truss Tube Capacity 661 lbs - 300 KG.

Engineered for the rigors of the entertainment industry, the ProX T-C4SH O-Clamp is the trusted choice for lighting professionals who demand strength, reliability, and ease of use. Crafted from high-strength AI 6061-T6 aluminum alloy, this clamp delivers an unbeatable combination of durability and lightweight performance—perfect for fast-paced stage setups and tear-downs.

Designed to fit most standard truss systems (1.5"–2" O.D. pipes), the O-clamp ensures quick, secure mounting of lighting fixtures, speakers, or rigging gear. Its broad contact surface evenly distributes weight, helping to protect your truss and gear from stress or damage.

What sets this clamp apart? It features a secure carriage bolt with lock-in-place design, ensuring that your fixtures stay firmly mounted even during transport or heavy use. No slipping, no shifting—just reliable, rock-solid rigging every time.

With a simple bolt and wing nut mechanism, setup is fast, tool-free, and rock solid—ideal for concerts, theaters, festivals, and touring productions.

This product is equipped with an M10 threaded bolt attachment

For 1.5-20" (38-51mm) Tubing 

Load Capacity: 660 lbs (300kg)

• M10 CSK (Countersunk) Bolt with Square Neck:
  Metric 10mm diameter bolt, Similar to a carriage bolt, but the square neck prevents the bolt from spinning—offering a more secure, locked-in fit.
   
• Complete Hardware Set:
  Includes a hex nut, flat washer, split lock washer, and a wing nut for added security and vibration resistance.
   
• Zinc Corrosion-Resistant Steel Bolt:
  Not just for looks—the zinc, yellow chromate plating protects against rust and corrosion, especially in humid or outdoor environments.
   
• Large O-Clamp Design with Handle:
  Handle allows for easy, tool-free tightening and adjustments.
   
• TÜV Certified:
  Certified by TÜV (a respected German safety and quality certification body). The “Ü” with two dots indicates it meets strict international safety standards—important for load-bearing or professional rigging equipment.