Schaefer Brush 43603 Tube Brush 5/16 in Brass Bristles

Product Description

The SCHAEFER BRUSH 43603 is a double stem, single spiral tube brush designed for cleaning the interior of small-diameter tubes, ports, and passages. It features brass bristles mounted on a brass brush body, making it well-suited for applications where ferrous contamination must be avoided or where softer tubing materials require a non-abrasive cleaning action. The brush measures 5/16 inches in diameter with an overall length of 4-1/2 inches and a brush scraper length of 3 inches. An 8-32 female threaded connection allows it to attach to compatible extension rods or drill chucks for powered or manual operation. HVAC technicians, plumbers, and refrigeration service pros use this style of brush for port and tube maintenance.

This tube brush is suited for light-duty cleaning of refrigerant ports, copper tube ends, small bore fittings, and similar passages found in HVAC, refrigeration, and plumbing systems. Its compact diameter makes it practical for tight access points where larger brushes cannot reach. The brass construction is compatible with copper, brass, and other soft-metal tubing without risk of scoring or contamination. It is sold individually and is intended for hand tool or low-speed rotary use.

Key Features

• Double stem, single spiral construction holds bristles securely throughout the brush length
• Brass bristles and brass body resist corrosion and prevent ferrous contamination
• 5/16 inches diameter fits small-bore tubes and ports common in HVAC and refrigeration work
• 8-32 female threaded connection accepts standard extension rods and handles
• 3 inches brush length with 4-1/2 inches overall length for reach in confined spaces
• Lightweight at 0.06 pounds — suitable for frequent handheld use

Compatibility

Designed as an OEM-style replacement and service brush for use in residential and light commercial HVAC, refrigeration, and plumbing maintenance applications requiring a 5/16 inches diameter, 8-32 female threaded tube brush.

Installation Notes

This brush is installed by a qualified HVAC technician, plumber, or refrigeration mechanic. Before cleaning any tube or port, shut off and isolate the system as required by applicable service procedures and local codes. Thread the brush onto a compatible handle or extension rod before use, and do not force the brush into passages smaller than its rated diameter to avoid bristle damage or blockage.