One of Unistrut’s defining features is its ability to easily assemble and adjust without welding. And while Unistrut may have become synonymous with channel, the secret to Unistrut’s unique weldless connection relies on nuts and bolts.

The initial Unistrut concept was a simple spring nut and bolt connecting a fitting to a continuous slotted channel. As variations of Unistrut products have developed over the years, so too have specific nuts for different applications.

The Unique Weldless Connection

The initial concept behind Unistrut’s design is adjustable and reusable and requires no welding, drilling, or special tools.

1. Insert the spring nut anywhere along the continuous slotted channel. The rounded nut ends permit easy insertion.
2. A 90° clockwise turn aligns the grooves in the nut with the inturned edges of the channel. Fittings can be placed anywhere along the channel opening, permitting complete freedom of adjustment.
3. Insert the bolt through the fitting and into the spring nut.
4. Additional channel sections can be bolted to the fitting already in place by following the above steps.
5. Tightening with a wrench locks the serrated teeth of the nut into the inturned edges of the channel, to complete a strong, vise-like connection.

The spring nut used in this application saves time and effort for installers. The spring holds the nut in place, saving 30 seconds to a minute per connection point, which can ultimately save money on labor costs for installation. 

While the spring nut is the most commonly used in Unistrut applications, it isn’t universal to all types of channel. Selecting the appropriate nut for your channel is crucial to ensuring a smooth installation. 

Channel Nut Compatibility 

Let’s take a look at a few of the available nut options and their compatible channel. 

Channel Nut With Spring

• Part Number: P1006-0832, P1006-1024, P1006-1420, P1007, P1008, P1009, P1010
  • Use With: P1000, P1100, P2000, P3000
• Part Number: P1012S, P1023S, P1024S
  • Use With: P1000, P1100, P2000, P3000
• Part Number: P4006-0832, P4006-1024, P4006-1420, P4007, P4008, P4009, P4010
  • Use With: P3300, P4000, P4400, P4520, P4100
• Part Number: P5506-0832, P5506-1024, P5506-1420, P5507, P5508, P5509, P5510
  • Use With: P5000, P5500

Channel Nut Without Spring

• Part Number: P3006-0832, P3006-1024, P3006-1420, P3007, P3008, P3009
  • Use With: Any channel
• Part Number: P3010
  • Use With: Any channel EXCEPT P3300, P4000, P4400, P4520, P4100
• Part Number: P3013
  • Use With: P3300, P4000, P4400, P4520, P4100
• Part Number: P1012, P1023, P1024
  • Use With: Any channel EXCEPT P3300, P4000, P4400, P4520, P4100
• Part Number: P4012, P4023
  • Use With: P3300, P4000, P4400, P4520, P4100
• Part Number: P1006T1420, P1008T
  • Use With: Any channel
• Part Number: P1010T
  • Use With: Any channel EXCEPT P3300, P4000, P4400, P4520, P4100
• Part Number: P4010T
  • Use With: P3300, P4000, P4400, P4520, P4100
• Part Number: P4908 (double conveyor adjusting nut)
  • Use With: Any channel

All of those options are only specific to the 1 ⅝” channel system. There are dozens more combinations for the 1 ¼” system, 13/16” system, fiberglass system, special metals, and more. 

With so many options to choose from, we know it can be confusing. Start with the information in the Unistrut General Engineering Catalog, and contact our knowledgeable team if you have questions.