K2 Systems CrossRail 44-X 172" (14 ft) Mounting Rail Mill Finish – 4000719

The K2 Systems CrossRail 44-X 172" Mounting Rail is a lightweight, high-strength aluminum rail engineered for residential and commercial rooftop solar installations. Measuring 172 inches (14 ft) in length, this mill-finish rail provides a durable structural foundation for photovoltaic module mounting on both pitched and flat roof applications.

Although compact and lightweight, the CrossRail 44-X delivers strength comparable to larger rail profiles while simplifying handling and installation. Manufactured from high-quality 6000-series aluminum, the rail offers outstanding corrosion resistance, long-term durability, and compatibility with a wide range of K2 mounting components for fast, secure solar installations. 

Key Features

• Lightweight High-Strength Rail
  Compact 44 mm profile delivers structural performance comparable to larger mounting rails while reducing installation weight.

• 6000-Series Aluminum Construction
  Provides exceptional corrosion resistance and long service life in demanding outdoor environments.

• 172" (14 ft) Length
  Long rail profile minimizes splices while supporting efficient array layouts.

• Mill Finish
  Natural aluminum finish offers excellent durability and corrosion protection.

• Universal K2 Compatibility
  Works seamlessly with K2 roof attachments, rail connectors, clamps, grounding accessories, and wire management products.

• Easy Installation
  Lightweight profile simplifies transportation, rooftop handling, and installation.

• Versatile Roof Applications
  Suitable for composition shingle, tile, flat tile, pitched roof, and flat roof solar installations.

• 25-Year Manufacturer Warranty
  Designed for decades of dependable structural performance.

Best Uses

• Residential Rooftop Solar
  Provides a strong, lightweight mounting platform for residential PV systems.
• Commercial Solar Installations
  Supports medium and large rooftop photovoltaic arrays.
• Pitched Roof Applications
  Compatible with a variety of residential roofing materials.
• Flat Roof Solar Systems
  Suitable for K2 flat roof mounting solutions.
• New Solar Installations & System Expansions
  Ideal for both new construction and retrofit photovoltaic projects.

Warranty

• Manufacturer Warranty: 25 Years
• Product Type: Solar Mounting Rail
• Material: 6000-Series Aluminum
• Finish: Mill

Product Specifications

Lightweight Strength for Professional Solar Installations

The K2 Systems CrossRail 44-X 172" Mounting Rail combines lightweight aluminum construction with exceptional structural strength, providing a dependable foundation for rooftop solar arrays. Designed for fast installation and long-term durability, it offers an efficient mounting solution for both residential and commercial photovoltaic systems.

Why Buy From US Solar Supplier

US Solar Supplier is an American-founded company based in Kentucky dedicated to offering top-quality solar components from trusted manufacturers. We provide competitive pricing, dependable inventory, and products backed by warranties you can trust.

Our inventory is updated daily with the latest solar technologies, and our experienced team is ready to assist with product selection, system design, and installation guidance.

Need Assistance?

Have questions before you order? Call 1-800-230-7004 to speak with our knowledgeable support team. We're here to help with product details, compatibility questions, or purchasing support.