Lambro Industries 2540 Galvanized Tension Clamps 4 in 500 Pack

Product Description

The LAMBRO INDUSTRIES 2540 is a 500-piece pack of 4-inch galvanized steel spring-tension clamps designed for securing flexible foil duct connections in residential and light commercial ventilation systems. Each clamp opens and closes with hand pressure alone, requiring no tools for installation. The spring-action design holds securely at duct-to-vent, duct-to-exhaust-outlet, and duct-to-connector joints. Galvanized steel construction resists corrosion in the humid environments typical of bathroom exhaust, kitchen range, and dryer duct applications. The bulk 500-count pack is suited for HVAC contractors and duct installers who need a reliable supply of clamps on hand for high-volume work.

These clamps are intended for use with flexible foil duct installations only. They are not rated for semi-rigid duct or rigid pipe applications. Common installation scenarios include bathroom exhaust fan duct terminations, range hood duct connections, and dryer vent transitions where flexible foil duct attaches to a collar, boot, or exhaust outlet. HVAC technicians and sheet metal installers are the primary trade users for this product.

Key Features

• 4-inch diameter fits standard flexible foil duct collar connections
• Galvanized steel construction resists corrosion in high-humidity ventilation environments
• Spring-tension design opens and closes with hand pressure — no tools required
• Bulk 500-piece pack supports high-volume installation work
• Not for use on semi-rigid duct or rigid pipe installations

Compatibility

Designed for use with 4-inch flexible foil duct attachments at vents, exhaust outlets, and duct connectors in residential and light commercial ventilation applications. Not compatible with semi-rigid or rigid duct systems.

Installation Notes

Installation does not require tools — open the clamp by hand, position it over the flexible foil duct at the connection point, and release to secure. Confirm the duct is fully seated on the collar or fitting before applying the clamp. Follow local mechanical codes and manufacturer guidelines for duct system design and termination requirements. These clamps are not a substitute for listed duct tape or other sealing methods where code requires an airtight seal.

Technical Specifications

• Diameter: 4 inches
• Material: Galvanized Steel
• Quantity: 500 per pack
• Country of Origin: China

Standard Information

• Brand: LAMBRO INDUSTRIES
• Manufacturer Part Number: 2540