Thermo Manufacturing 44002 Thimble Kit Round 2.875 in Ac Line Set

Product Description

The THERMO MANUFACTURING 44002 is a round thimble kit designed for routing air conditioning line sets and low-voltage wiring through exterior or interior walls. Built for a 2.875-inch diameter opening and compatible with walls up to 12 inches thick, this kit creates a permanent, airtight seal at the penetration point. HVAC technicians and installers use it to produce a clean, professional finish on both new construction and retrofit projects. The included flange is pre-marked for nails or screws, simplifying attachment to finished wall surfaces.

This thimble kit is suited for residential and light commercial HVAC installations where line sets and control wiring pass through framed walls, concrete block, or similar wall assemblies. It works in both new construction rough-in and retrofit situations where existing penetrations need to be properly sealed and finished. A temporary plug is included to keep the opening closed against air infiltration, insects, and debris during and after installation.

Key Features

• Creates a permanent, airtight seal through wall penetrations
• Accommodates walls up to 12 inches thick
• Fits 2.875-inch diameter round openings for AC line sets and wire runs
• Temporary plug blocks air infiltration, insects, and pests
• Pre-marked flange accepts nails or screws for secure wall attachment
• Suitable for new construction and retrofit installations
• Eliminates unsightly open holes without the need for patching

Compatibility

Designed as an OEM-style thimble kit for residential and light commercial HVAC line set and low-voltage wire wall penetration applications requiring a 2.875-inch round opening in walls up to 12 inches thick.

Installation Notes

Installation is typically performed by a licensed HVAC technician as part of line set routing during system installation or replacement. Power down the HVAC system and disconnect all electrical circuits before feeding wiring through the penetration. Verify that the wall opening matches the 2.875-inch diameter specified for this kit before seating the thimble. Follow local building codes regarding wall penetration sealing requirements for fire-rated or exterior assemblies.

Technical Specifications

• Diameter: 2.875 inches
• Maximum Wall Thickness: 12 inches
• Shape: Round
• Application: AC Line Set and Wire Penetration

Standard Information

• Brand: THERMO MANUFACTURING
• Manufacturer Part Number: 44002