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Kupo KG803912 Silver Arch Coupler — main product image
Kupo KG803912 Silver Arch Coupler
Kupo KG803912 Silver Arch Coupler
Kupo KG803912 Silver Arch Coupler
Kupo

Kupo KG803912 Silver Arch Coupler

330lbs

TUV-approved aluminum arch coupler with a 330 lb safe working load for professional rigging on 38–51mm tubes.

$43.95*
✓ In Stock on Amazon.com
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Kupo KG803912 Silver Arch Coupler is designed for professional rigging environments where secure, load-rated connections are non-negotiable. Built from aluminum gravity casting, it weighs just 1.54 lbs while supporting a safe working load of 330 lbs (150 kg) — a ratio that makes it particularly useful in touring setups where rig weight adds up quickly. The coupler fits tubes with outer diameters from 38mm to 51mm, covering the standard range of truss pipes and lighting bars found on stages, in studios, and at event venues.

Each unit ships with an M12 hex head bolt, so installation requires only a wrench rather than sourcing separate fasteners. The polished silver finish gives the coupler a clean look suitable for visible installations, and the aluminum material offers natural corrosion resistance for rigs that may be exposed to humidity or outdoor conditions. TUV approval confirms that the coupler has been independently tested and certified, an important consideration for any overhead rigging application where safety is the primary concern.

Key Features

SPECIFICATIONS: Lightweight aluminum gravity-cast arch coupler with polished Silver, rated for loads up to 330lbs, designed to fit tubes with outside diameters from 38mm to 51mm and compatible with M10 or M12 hex bolts.

HIGH LOAD CAPACITY: Developed for professional installations requiring secure support up to 330lbs, making it suitable for lighting, grip, and truss-mounted equipment in production environments.

PROFESSIONAL SAFETY: Features TUV approval and precision-engineered construction to deliver reliable holding power and consistent performance in critical rigging applications.

EFFICIENT HANDLING: Ergonomic horizontal handle allows quick tightening and release, helping crews save time during setup, adjustments, and breakdown on set or stage.

DURABLE : Polished Silver aluminum construction resists wear and corrosion while maintaining a clean, professional appearance for long-term use.

Specifications

Brand
Kupo
Model
KG803912
Safe Working Load
330 lbs / 150 kg
Tube Diameter Range
38mm – 51mm OD
Material
Aluminum (gravity casting)
Hardware
M12 hex head bolt
Finish
Polished Silver
Weight
1.54 lbs / 0.7 kg
Height
1.59 in / 4.03 cm
Length
5.67 in / 14.4 cm
Width
5.1 in / 12.95 cm
Certification
TUV Approved

Pros & Cons

👍 Pros

  • 330 lb safe working load with TUV certification provides confidence in overhead rigging scenarios.
  • Aluminum gravity casting keeps the coupler light at just 1.54 lbs without sacrificing strength.
  • Fits a range of tube diameters from 38mm to 51mm, accommodating common truss and pipe sizes.
  • Included M12 hex head bolt simplifies installation without sourcing separate hardware.
  • Polished silver finish resists corrosion and maintains a clean, professional appearance on visible rigs.

👎 Cons

  • Single-coupler design requires purchasing a second unit to join two tubes together at a junction.
  • Does not fit tubes smaller than 38mm OD, ruling out lighter-duty pipe and speedrail.
  • Aluminum construction, while lightweight, is less durable than forged steel couplers under repeated heavy loading.
  • Polished finish may show scratches and handling marks more readily than a matte or powder-coated surface.

Frequently Asked Questions

It accommodates tubes with an outer diameter ranging from 38mm to 51mm, covering standard truss and pipe sizes used in professional rigging.
The KG803912 has a rated safe working load of 330 lbs (150 kg), and it carries TUV approval for professional installations.
It is constructed from aluminum gravity casting, which provides high strength at a low weight of just 1.54 lbs (0.7 kg).
The coupler comes with an M12 hex head bolt for securing it to the tube.
Yes, its TUV approval and 330 lb safe working load rating make it appropriate for overhead and load-bearing rigging applications when used within its rated capacity.

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