UltraLox 3″ x 3″ Aluminum Rail Post Kit

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Easy Installation

UltraLox rails uses a hidden fastener system for quick and easy installation. No welding or riveting required.

Durable Finish

Durable high quality textured powder coated finish. Avaliable in black, bronze, and white. Meets AAMA 2604 specifications.

15 Year Warranty

UltraLox products are backed by a 15 year warranty.


UltraLox railing panels are preassembled and ready for installation. UltraLox railing systems are manufactured using their patented UltraLox Interlocking machine.

3″ x 3″ Post with Cap and Vinyl Base Plate Cover
3″ x 3″ Post Cap

Vinyl Base Plate Cover

Color Options


Powder coated 3″ x 3″ aluminum post for use with UltraLox 42″ aluminum rail panels. Available in black, bronze or white AAMA 2604 compliant textured powder coated finishes. UltraLox rail panels are mounted using a hidden fastener system, no welding or riveting required. UltraLox products are engineered, tested and approved in accordance with ICC-ES AC273 building codes and is backed by a 15-year limited warranty.

Each post kit includes an aluminum post with base plate, cap and vinyl base plate cover. We ship all posts with the base plate premounted. Mounting screws/anchors are not included. UltraLox recommends 5/16″ x 4″ fasteners for surface installation.


  • Post Height with Base Plate:
    • With Cap: 45″
    • Without Cap: 44-1/4″
  • Base Plate:  5″ x 5″ x 9/16″
  • Cap: 3-1/4″ x 3-1/4″ x 1-1/8″
  • Vinyl Base Plate Cover: 5-1/4″ x 5-1/4″ x 2-1/8″

Post with base plate, cap and base plate cover: ~6.25 lbs.

Included with Each Post Kit
  • 1x Post with Base Plate
  • 1x Post Cap
  • 1x Vinyl Base Plate Cover
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