Pro-source 04990 Brass Twisted Wire Bristle Brush

Product Description

The PRO-SOURCE 04990 is a single-spiral brass twisted wire bristle brush designed for bore cleaning, deburring, and surface preparation in tight or restricted access areas. The brush head measures 3/4 inches in length with a 3/16-inch diameter, and the overall assembly reaches 4 inches from tip to shank end. Brass fill material provides effective scrubbing action on softer metals and tube interiors without causing the surface damage associated with harder abrasives. The 0.004-inch wire diameter delivers flexible, consistent contact across the work surface. The 0.062-inch stainless steel shank is sized for use with standard rotary tools and drill chucks.

This brush is well suited for HVAC, plumbing, and general mechanical service work where tube ends, fittings, ports, or small bores require cleaning prior to soldering, brazing, or assembly. Typical applications include cleaning copper tube interiors, condenser ports, metering device orifices, and threaded or unthreaded bore passages. The compact brush diameter and 4-inch overall length allow access in confined equipment cavities where larger brushes cannot reach. Installation and maintenance technicians in the HVAC and plumbing trades commonly use this style of brush as part of routine surface prep before joining or sealing operations.

Key Features

• Brass fill wire resists corrosion and is safe for use on copper, aluminum, and soft alloy surfaces
• Single-spiral construction provides even radial contact throughout the bore
• 0.004-inch wire diameter delivers flexible bristle action without excessive material removal
• Stainless steel shank resists bending and fits standard 1/16-inch to 1/8-inch rotary tool chucks
• 4-inch overall length allows reach into recessed ports and enclosed equipment compartments
• 3/16-inch brush diameter targets small-bore cleaning tasks not addressed by standard tube brushes

Compatibility

Designed as an OEM-style replacement and general-use bore brush compatible with standard rotary tools, flex-shaft tools, and drill chucks accepting a 0.062-inch round shank.

Installation Notes

This brush is installed into a rotary tool, drill, or flex-shaft handpiece by inserting the stainless steel shank into the appropriate collet or chuck. Secure the shank fully before operating at speed. Inspect the bristle fill for splaying or wire fatigue before each use, and replace the brush if bristles show significant deformation. Always wear eye protection when operating wire brushes at rotary speeds.