usvehj Air Conditioning Splice Connector Kit — 5/8, 1/2 & 3/8 in Aluminum Line-to-Line Repair, Quick Fit

usvehj Air Conditioning Repair Splice Connector Kits are compact, universal fittings that let you splice and restore damaged aluminum refrigerant lines for 5/8", 1/2" and 3/8" sizes without replacing the entire assembly.

When an aluminum A/C line develops a small leak or localized damage, replacing the whole tubing harness is costly and time-consuming. These splice kits—sold as 800-640 (5/8"), 800-641 (3/8") and 800-642 (1/2")—provide a targeted repair option compatible with common OEM interchange numbers. Built from copper, aluminum and rubber components, the kits are intended for line-to-line repairs and to be installed quickly with basic hand tools.

How do these splice connectors restore a damaged refrigerant line?

The kits create a secure physical and sealed connection between two cut ends of aluminum tubing, re-establishing continuity without swapping out the entire line. Each kit includes the mechanical coupling and sealing elements designed to match the nominal tube diameter so you can rebuild the line where the damage occurs.

• Direct line-to-line coupling for 5/8", 1/2", or 3/8" aluminum tubing
• Internal seals and compression surfaces to prevent refrigerant loss
• Works with standard hand tools—no specialty crimpers required

What sizes and part numbers are these kits compatible with?

There are three size-specific kits: 800-640 for 5/8" lines, 800-642 for 1/2" lines, and 800-641 for 3/8" lines. Each size is cross-referenced to several common OEM numbers so you can confirm fitment against your vehicle or equipment part references.

• 800-640 (for 5/8" aluminum tubing) — interchangeable with numbers like 19188253 and AC58
• 800-642 (for 1/2" aluminum tubing) — matches common OEM designations such as 19194700
• 800-641 (for 3/8" aluminum tubing) — cross-references include 19194701 and AC38

How difficult is installation and what tools are needed?

Installation is intended to be straightforward for anyone comfortable with basic mechanical work. No special hydraulic or flaring equipment is required—most splices can be completed using standard hand tools and a screwdriver to tighten clamps or fasteners.

• Cut out damaged section and prepare clean tube ends
• Slide coupling and seals into place, align and compress per instructions
• Tighten fasteners with common hand tools; test for leaks after installation

What materials are used and how durable is the repair?

The kits use a combination of copper, aluminum and engineered rubber components selected for their corrosion resistance and mechanical strength. These materials are chosen to withstand typical under-hood conditions and provide a long-lasting repair when installed correctly.

• Copper and aluminum mating surfaces for conductivity and corrosion resistance
• Rubber seals designed to maintain a gas-tight connection under pressure
• Constructed to handle common automotive A/C environmental stresses

Who is this product for? The usvehj splice connector kits are aimed at DIYers, independent mechanics and fleet maintenance teams who need a cost-effective, time-saving solution to mend localized damage in aluminum A/C lines. If you want to avoid full-line replacement costs and prefer a fast, on-vehicle repair using ordinary tools, these kits offer a practical option. They are not intended to upgrade or modify system design—only to repair existing aluminum refrigerant tubing to restore sealed operation.

Note: Always follow vehicle manufacturer service procedures for depressurizing and evacuating refrigerant before performing any repairs. Confirm compatibility with your specific make and model and test the repair for leaks after installation.