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The Light Source

The Light Source Monstro-Coupler 4.5 for 4" Pipe (4.5" OD), Black Anodized

$230.00

The Monstro-Coupler 4.5 is a professional rigging accessory engineered to connect 4-inch OD pipes securely.

 Constructed from high-strength aluminum with a black anodized finish, it provides reliable load-bearing capacity for lighting, trusses, and scenic elements.

 Its precision machining and ergonomic design allow easy installation and adjustment in demanding theater, studio, and live event applications.

View Product Features

  • Connects 4" OD pipes securely
  • Black anodized aluminum construction
  • High load-bearing capacity
  • Precision-machined for consistent attachment
  • Easy installation and adjustment
  • Ideal for stage, studio, and event rigging
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About the The Light Source Monstro-Coupler 4.5 for 4" Pipe (4.5" OD), Black Anodized

The Light Source Monstro-Coupler for 4-inch nominal pipe, with a specified outer diameter of 4.5 inches, is a heavy-duty industrial connector engineered for creating continuous, high-strength splices in large-scale structural tubing systems. Designed to join two sections of substantial 4.5-inch OD aluminum or steel pipe, this coupler forms the backbone for constructing massive columns, beams, and truss chords in applications demanding exceptional load-bearing capacity, such as concert stage roofs, industrial mezzanines, large exhibit hall structures, and architectural installations. Its black anodized finish provides a durable, corrosion-resistant surface that also delivers a uniform, professional appearance, allowing the structural components to maintain a cohesive and visually subdued profile within the overall design.

Precision-machined from a solid billet of high-strength aluminum, the coupler's internal diameter is held to exacting tolerances to ensure a full-circumference fit on the specified tube. This maximizes the surface area for load transfer through friction and mechanical interlock. Multiple high-tensile set screws are strategically positioned around the coupler's perimeter to apply powerful, even radial compression, creating a connection that resists axial pull, bending moments, and torsional forces. The robust construction and substantial wall thickness of the coupler itself ensure that it acts as a rigid extension of the pipe rather than a flexible joint, providing the structural predictability required for engineering calculations and safety certifications.

In practical terms, this coupler enables the fabrication of extra-long structural members from shorter, more manageable sections, simplifying logistics, transportation, and on-site assembly for monumental projects. It is a key component in the toolkit for building temporary or semi-permanent frameworks that must support significant weight, such as lighting rigs, sound systems, and overhead signage. By offering a weld-free mechanical connection that approaches the strength of a welded joint, the 4.5-inch OD Monstro-Coupler embodies the principles of modular engineering at its most robust, providing unparalleled strength, reliability, and reusability for the world's most ambitious structural endeavors.

Key Features

  • Connects 4" OD pipes securely
  • Black anodized aluminum construction
  • High load-bearing capacity
  • Precision-machined for consistent attachment
  • Easy installation and adjustment
  • Ideal for stage, studio, and event rigging

The Light Source Monstro-Coupler 4.5 for 4" Pipe (4.5" OD), Black Anodized Specs

Connector Scale & Designation
Series
Monstro-Coupler (Industrial Scale)
Compatible Pipe Size
4 Inch Nominal
Compatible Pipe Actual OD
4.5 Inches (114.3 mm)
Finish
Black Anodized
Dimensional & Mechanical Engineering
Internal Diameter
Precision Machined for 4.5" OD Tube
Wall Thickness
Substantial for High Load-Bearing Capacity
Fastener Configuration
Perimeter Array of Set Screws
Clamping Principle
Radial Compression via Torqued Set Screws
Material & Fabrication
Primary Material
6061-T6 Aluminum (Billet)
Manufacturing Process
CNC Machined from Solid
Fasteners
High-Strength Alloy Steel Socket Head Cap Screws
Surface Treatment
Type III Hardcoat Anodized, Black
Performance & Structural Application
Primary Load Path
Axial Load & Bending Moment Transfer
Installation Tool
Large Hex Key/Allen Wrench
Typical Use Case
Primary Structural Supports in Large Venues, Heavy Industrial Framing
Key Benefit
Enables Creation of Long, Continuous Load-Bearing Members from Standard Pipe Lengths

Key Features

  • Connects 4" OD pipes securely
  • Black anodized aluminum construction
  • High load-bearing capacity
  • Precision-machined for consistent attachment
  • Easy installation and adjustment
  • Ideal for stage, studio, and event rigging
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