Schaefer Brush 93604 Tube Brush 3/8 in Brass Bristles

Product Description

The SCHAEFER BRUSH 93604 is a double stem, single spiral tube brush designed for cleaning the inside of tubes, pipes, and small-bore fittings. It features brass bristles mounted on a brass brush body, making it suitable for use on copper, brass, and other soft-metal surfaces without risk of ferrous contamination. The brush measures 3/8 inches in diameter with an overall length of 6-1/4 inches and a brush section length of 4 inches. The 8-32 male threaded connection allows it to attach to compatible extension rods or handles. Plumbers, HVAC technicians, and pipe fitters use this tool during cleaning, inspection prep, and maintenance work on tubing and small-diameter pipe assemblies.

This tube brush is well suited for residential and light commercial service work involving small-diameter copper or brass tubing. Typical applications include cleaning tube ends before soldering, removing oxidation or debris from fittings, and scrubbing interior bore surfaces of valves or heat exchanger tubes. The single spiral design provides consistent bristle contact along the bore wall, and the double stem construction adds rigidity during use. It is a standard hand tool found in HVAC service kits and plumbing maintenance toolsets.

Key Features

• 3/8 inch diameter fits standard small-bore tube and pipe cleaning applications
• Brass bristles safe for use on copper, brass, and soft-metal surfaces
• 4 inch brush section length with 6-1/4 inch overall length for reach in confined spaces
• 8-32 male threaded connection compatible with standard extension rods and handles
• Double stem construction provides rigidity and consistent spiral bristle contact

Compatibility

Designed for use with standard 8-32 threaded extension rods and handles. Suitable for cleaning 3/8 inch inside-diameter tubes, pipes, and small-bore fittings in HVAC, plumbing, and general mechanical maintenance applications.

Installation Notes

This brush is a hand-use or rod-driven cleaning tool and does not require power. Ensure the system or assembly being cleaned is depressurized and free of fluid before brushing. When attaching to a drill or extension rod, verify the 8-32 thread engagement is secure before use. Do not exceed the bristle diameter rating by forcing the brush into undersized bores, as this can deform the bristles and reduce cleaning effectiveness.