Schaefer Brush 93603 Tube Brush 5/16 in Brass Bristles

Product Description

The SCHAEFER BRUSH 93603 is a double stem, single spiral tube brush designed for cleaning the interior of small-diameter tubes, ports, and passageways. The brush features brass bristles mounted on a brass construction with a double stem twist that maintains consistent radial pressure along the full brush length. At 5/16 inch in diameter and 4-1/2 inches overall length, with a 3-inch brush segment, this tool is suited for reaching into tight bore diameters. The 8-32 male threaded connection allows it to mount directly to standard extension rods or compatible drill handles for powered or manual use.

This tube brush sees regular use in HVAC, plumbing, refrigeration, and light industrial maintenance applications. Technicians rely on it to clear scale, flux residue, oxidation, and debris from copper tubing ends, valve ports, burner orifice housings, and small-bore fittings. Its brass bristle material is non-sparking and safe for use on soft metal surfaces including copper and brass components without risking gouging or contamination.

Key Features

• Double stem, single spiral construction maintains consistent contact pressure inside tube bores
• Brass bristles are non-sparking and compatible with copper, brass, and other soft metal surfaces
• 3-inch brush length provides thorough cleaning coverage in short tube sections
• 8-32 male threaded connection is compatible with standard extension rods and drill adapters
• Compact 5/16 inch diameter fits small-bore tubing, ports, and passageways

Compatibility

Designed for use in tube cleaning applications requiring a 5/16 inch diameter brush with an 8-32 male threaded connection. Compatible with standard extension rods and brush handles accepting 8-32 male threaded tube brush fittings.

Installation Notes

This brush is installed by HVAC technicians, plumbers, and maintenance personnel using standard tube brush extension handles or compatible drill chucks. Before use, ensure the threaded connection is fully seated to prevent separation during operation. When used in powered applications, operate at low speeds to avoid bristle flare or premature wear. Inspect bristles before each use and replace the brush if bristle deformation reduces cleaning effectiveness.