Weller TST4 Screwdriver Soldering Iron Tip 0.187 Inch

Product Description

The WELLER TST4 is a screwdriver-style soldering iron tip designed for precision soldering work in electrical, electronic, and light trade applications. Built from copper, it delivers efficient heat transfer to the work surface, helping maintain stable tip temperatures during repeated joints. The tip measures 0.187 inches in point width and 0.75 inches in length, making it well suited for flat-pad and through-hole solder joints where a wider contact face improves flow and dwell time. This tip is part of the ST series and is intended for use with compatible Weller soldering irons. Electricians, electronics technicians, and bench repair professionals are the typical installers.

The WELLER TST4 fits into bench and field soldering workflows where consistent tip geometry matters. The screwdriver profile works well on terminals, wire leads, and component pins that benefit from flat-face contact rather than a conical point. It is a standard single-quantity replacement tip, making it practical to stock as a consumable for service kits and repair benches.

Key Features

• Screwdriver tip geometry provides flat-face contact for improved heat transfer on terminals and flat pads
• Copper construction for efficient thermal conductivity
• 0.187-inch point width suits a range of standard through-hole and surface solder joints
• 0.75-inch tip length for controlled reach in confined work areas
• Part of the ST series for straightforward replacement and stocking

Compatibility

Designed as an ST series replacement tip for compatible Weller soldering irons that accept ST series tips.

Installation Notes

Tip replacement should be performed with the soldering iron fully powered off and cooled to ambient temperature. Use the appropriate tip removal tool or pliers with care to avoid damaging the heating element or tip seat. Follow the iron manufacturer's guidance for tip installation torque and seating. Proper tip tinning after installation extends tip life and maintains heat transfer performance.