Weller ST5 Single Flat Soldering Iron Tip 0.031 Inch

Product Description

The WELLER ST5 is a single flat soldering iron tip designed for precision soldering work across electrical, electronics, and light mechanical applications. Manufactured from copper, the tip measures 0.75 inches in length with a point width of 0.031 inches, making it well suited for fine work on small pads, terminals, and through-hole components. The flat tip geometry provides consistent heat transfer and controlled solder flow. At 0.04 pounds, the ST5 is lightweight and easy to handle during extended soldering sessions. It is intended for use with compatible Weller soldering irons in the ST series and is sold individually.

The ST5 is used in electrical and electronics service work where a small, precise tip is required. Common applications include circuit board rework, terminal soldering, wire tinning, and component replacement. The flat single tip style is a standard choice for technicians who need repeatable contact on closely spaced connections. Electricians, electronics technicians, and skilled trade professionals working on low-voltage control boards, sensors, and similar components will find this tip appropriate for detail-oriented work.

Key Features

• Single flat tip geometry for controlled, precise solder application
• 0.031 inch point width suited for fine pitch and small terminal work
• Copper tip material provides good thermal conductivity
• 0.75 inch tip length for close-quarter access
• Lightweight at 0.04 pounds for reduced hand fatigue
• Part of the ST series, designed for use with compatible Weller soldering irons

Compatibility

Designed for use with Weller ST series soldering irons. Verify compatibility with the specific iron model before installation.

Installation Notes

Allow the soldering iron to cool completely and disconnect it from power before removing or installing a tip. Use the appropriate tip removal tool or heat-resistant cloth to avoid burns. Follow applicable electrical safety practices per NEC guidelines when performing soldering work on energized or sensitive control circuits. Do not force the tip into the heating element — seat it fully and allow it to reach operating temperature before use.