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Ultra-TEC 300 Series Railing Kit w/25' 3/16" Cable - 30025-C6 (Level Runs Only)

Ultra-TEC 300 Series Railing Kit w/25' 3/16" Cable - 30025-C6 (Level Runs Only)
Ultra-TEC 300 Series Railing Kit w/25' 3/16" Cable - 30025-C6 (Level Runs Only)

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The 300-C Series Cable Railing Kit by Ultra-Tec features a surface-mount configuration, along with two different cable size options, a wide variety of lengths and a design specifically for use with wooden posts with composite sleeves with an outside diameter greater than 4½". The tensioning device is an Adjust-A-Body with Hanger Bolt, which lags into the wood post on one end, while a Push-Lock Lag is lagged into the other. With this kit's 100% swageless design specifically made for DIY homeowners, it will completely eliminate the need for expensive professional installation while also making your deck look great!

Swageless fittings are made to easily be installed by hand in the field, requiring only the use of Cable Cutters. By using swageless fittings, the holes that need to be made only need to be as big as the bare cable that passes through. This also eliminates the use installers or expensive machinery because it can all be done by hand in a matter of minutes.

Surface-Mount configurations are the only types of installations that the 300-C Series can be used with. Surface-Mount installations create an organized, clean look while also serving as a secure means of installing your cable railing in situations where the back of the post is inaccesible. The 300-C Series should not be used on corner installations.


  • Swageless Design
  • 4½" Or Greater Wood Posts With Composite Sleeves Only
  • Level Runs Only
  • Surface-Mount Configuration
  • Cable Diameter: 3/16"
  • Cable Length: 25'
  • Stainless Steel Grade 316 For Indoor/Outdoor Use


  • 1x19 Stainless Steel Cable
  • Adjust-A-Body With Hanger Bolt
  • Pre-Attached Swaging Ferrule
  • Push-Lock Lag

Wood Post Installations

For wooden posts, a minimum outside diameter of 4½" is required to keep the post from bending when cables are tensioned. A top rail is also needed and is recommended that it be reinforced with a support such as a 2" x 4" on end under the top rail. End posts must also be securely mounted to the deck in order to prevent the post from coming loose while tensioning cables. Additonally, a bottom rail is recommended to to help distribute the force away from the bottom of the post, however it is not required.

Intermediate Posts

Intermediate posts (or mid-posts) are to be placed every 48" between end posts. An intermediate post runs from the top rail to the lower mounting surface and is integral for proper structural design. Intermediate posts can be substituted with something thinner such as an aluminum or steel cable brace. Cables are strung through holes in each post in order to provide support between end posts. Each post hole made should not exceed 3" vertical spacing in order to comply with IBC regulations. Cable Braces can be purchased here.

Tools Needed For Installation:

  • 5/32 Drill Bit For 1/8" Cable / 7/32 Drill Bit For 3/16" Cable
  • 7/32 Drill Bit For Hanger Bolt and Lag Installation
  • 3/8 Hex Wrench For Turning Hanger Bolt
  • 7/16 Wrench For Tensioning Adjust-A-Body
  • 3/8 Wrench For Installing Push-Lock Lag
  • Cable Cutting Tool

Application Guide Installation Guide

*In order to comply with IBC regualtions, an intermediate post must be placed every 48" between posts and distance between each cable shall not exceed 3", however specific city and state rules and regulations may apply.


Additional Information

SKU 30025-C6
Cable Kit Series 300-C
Post Type Wood Post With Composite Sleeve
Mount Type Surface Mount
Application Interior/Exterior
Cable Railing Design Swageless
Kit Assembly Components Adjust-A-Body With Extended Length Hanger Bolt, Push-Lock Lag
Cable Run Straight (Level)
Cable Length 25'
Cable Diameter 3/16"
Cable Material 316 Grade 1x19 Stainless Steel
Installation DIY Friendly
Environmental Impact Made Of Recycled Materials
Country of Manufacture United States
Manufacturer Ultra-Tec

Ultra-TEC 300 Series Railing Kit w/25' 3/16" Cable - 30025-C6 (Level Runs Only)