EVT25C-ALC — Aluminum Truss Clamp for 25mm Tubing

The EVT25C-ALC is a lightweight aluminum clamp for 25mm OD tubing, truss, and pipe — the mid-range small-tube mounting solution for accessories, sensors, cable management, and light-duty fixtures on narrow-profile truss chords and small-diameter pipe that fall between the 20mm and 35mm clamp ranges. Built from 6061-T6 aluminum alloy with S45C carbon steel hardware, the EVT25C-ALC uses a nylon-insert locknut closure rather than a wing nut — the nylon insert grips the bolt thread and resists self-loosening under vibration and repeated thermal cycling without requiring a spring lock washer. The M6 flanged button-head cap screw provides a low-profile attachment point for accessory brackets and fixture yokes with standard M6 mounting slots.

Function and Compatibility:

The EVT25C-ALC mounts to any 25mm OD round tube or pipe through a bolt-and-collar assembly. The collar opens, seats onto the tube, and closes before the M8 nylon-insert locknut is tightened clockwise to clamp the collar securely in place. The nylon-insert locking mechanism self-resists loosening under the vibration and temperature variation that standard wing nut clamps can work against over time — making this closure particularly useful for permanent or semi-permanent installations where re-tightening between uses is not practical. The included M6 x 10mm flanged button-head cap screw threads into any standard M6 accessory mounting slot, with the flanged button-head profile distributing clamping load across a wider bearing surface than a standard hex bolt. Compatible with any round tube or pipe in the 25mm outer diameter range used in exhibition structures, retail displays, architectural installations, and small-diameter overhead pipe grid systems.

Key Features

• 25mm Tube Fit: Designed for 25mm OD tubing — fills the gap between the 20mm and 35mm clamp ranges for mid-size small-tube applications.
• Nylon-Insert Locknut Closure: M8 nylon-insert locknut resists self-loosening under vibration and thermal cycling without a separate spring lock washer — reliable long-term clamping for permanent and semi-permanent installations.
• M6 Flanged Button-Head Cap Screw: Low-profile flanged button-head attachment screw distributes load across a wider bearing surface than a standard hex bolt, included at M6 x 10mm length.
• 6061-T6 Aluminum Body: High-strength structural aluminum keeps the clamp lightweight for quantity use across a full installation without adding significant load to the structure.
• S45C Carbon Steel Hardware: High-strength S45C carbon steel fasteners for reliable long-term clamping performance.

Assembly Instructions

1. Release the nylon-insert locknut by turning it counterclockwise to release the bolt and open the collar.
2. Place the EVT25C-ALC on the truss, tube, or pipe and close the collar.
3. Put the bolt back in place with the washer and nylon-insert locknut above the collar.
4. Make sure the EVT25C-ALC is located in its proper place on the truss, tube, or pipe before tightening the nylon-insert locknut.
5. Turn the nylon-insert locknut clockwise to tighten and secure the EVT25C-ALC into place.

Safety and Rigging Notice

Critical Rigging Guidelines:

• Load Rating: Do not exceed the rated load capacity of the EVT25C-ALC or the truss system it is installed on.
• Inspection: The EVT25C-ALC should be fully inspected before every use. In the occurrence of any damage or defect, the clamp should not be used.
• Secondary Safety: The use of safety cables is recommended for maximum security on all overhead applications.
• Professional Review: The purchase of this product does not authorize or approve a specific installation or use. A licensed professional engineer shall review all structures, lighting plots, or other clamp uses.

Technical Resources and Project Support

Need load tables, CAD files, or engineering documentation for this product? Contact the Evolve Truss team — we'll get you what you need.

Disclaimer and Guidance Statement: The purchase of any product shall not be construed as authorizing or approving a specific installation or usage. A licensed professional engineer shall review all structures, lighting plots, or any other product uses. While exhaustive efforts have been undertaken to ensure the precision of this information, Evolve Truss Worldwide, LLC hereby disclaims any and all liability for errors. These drawings are intended solely for the purpose of providing guidance and should not be construed as definitive representations.