Cain Manufacturing LFCWF100 Insulation Weld Fastener

Product Description

The CAIN MANUFACTURING LFCWF100 is an insulation weld fastener designed for securing duct liner inside HVAC ductwork assemblies. At 0.75 inches in length, it is sized for use with 1 to 1.5 lb density duct liner, the standard liner weight range found in most residential and light commercial duct systems. Sheet metal workers and HVAC installers use weld fasteners like this to pin liner material flush against duct walls, preventing sagging and maintaining thermal and acoustic performance over the life of the system.

This fastener is suited for new duct fabrication and liner retrofit applications in air handling systems where duct liner must be mechanically secured in addition to adhesive bonding. The 0.75-inch shank length accommodates the typical compressed thickness of 1 to 1.5 lb liner material without over-penetrating or leaving exposed tips that could disrupt airflow.

Key Features

• 0.75-inch length sized for 1 to 1.5 lb duct liner applications
• Weld-style fastener for mechanical attachment of liner to sheet metal duct walls
• Compatible with standard duct liner densities used in residential and light commercial HVAC systems
• Helps prevent liner sagging and delamination in supply and return duct assemblies

Compatibility

Designed as an OEM-style replacement weld fastener for use with 1 to 1.5 lb density duct liner in sheet metal ductwork fabrication and retrofit applications.

Installation Notes

Weld fasteners are installed by HVAC sheet metal technicians using a capacitor-discharge stud welder rated for the fastener size. Power down and de-energize any associated air handling equipment before working inside ductwork. Follow SMACNA duct construction standards for fastener spacing when securing liner to duct walls. Do not leave exposed fastener tips projecting into the airstream, as this can affect liner integrity and airflow.

Technical Specifications

• Length: 0.75 inches
• Application: 1 to 1.5 LB Duct Liner

Standard Information

• Brand: CAIN MANUFACTURING
• Manufacturer Part Number: LFCWF100