Weller TST4 Replacement Soldering Iron Tip, .187″ Screwdriver Shape

The Weller TST4 replacement soldering tip features a 0.187″ wide screwdriver shape, ideal for medium-duty soldering jobs across electrical, DIY, and electronics repair work. Designed for compatibility with a range of Weller soldering irons—SP40L, SP40N, WLC100, WP25, WP35, and WP40—this tip delivers consistent heat transfer and controlled soldering performance. Whether you’re working on circuit boards, wire joins, or light assembly tasks, the TST4 provides a reliable, even tip profile for both novice and professional users.

This tip is a solid fit for electrical technicians, maintenance crews, trade students, and electronics hobbyists who need a general-purpose soldering solution. The flat, screwdriver-style face offers greater surface contact for heat transfer on wires, terminals, and pads. With a length of 0.750″ (19.05 mm), the TST4 is long enough for control and visibility, while remaining short enough to minimize tip flex or heat loss.

Weller TST4 Replacement Soldering Iron Tip, .187″ Screwdriver Shape Features

• 0.187″ Screwdriver Tip: Designed for general-purpose soldering with good surface contact for flat joints
• Compatible with Popular Irons: Fits SP40L, SP40N, WLC100, WP25, WP35, and WP40 models commonly used in trades and training
• Consistent Heat Transfer: Maintains stable temperature for cleaner, faster joints
• Durable Construction: Manufactured to withstand repeated heat cycles for longer service life
• Tool-Free Installation: Quickly installs into compatible Weller irons without additional tools

Markets

• Electrical Repair Suitable for soldering terminals, wire ends, and connectors during general electrical service
• Educational Institutions & Trade Schools Compatible with widely used Weller models found in classrooms and training labs
• DIY & Hobby Electronics Offers precision and durability for at-home projects including Arduino, Raspberry Pi, or circuit kits
• Municipal & Facility Maintenance Perfect for on-site electrical fixes and control panel adjustments using standard Weller tools
• Light Assembly Work Used in small manufacturing or assembly environments for routine soldering of wires and small components
• Telecommunications Installers Helps techs make quick, reliable terminations during infrastructure setups
• Instrumentation Technicians Delivers stable results when soldering measurement and sensor wiring in lab and field conditions

Professionals and institutions alike benefit from the reliability and availability of this Weller-compatible replacement tip. It’s a practical solution for tool rooms, repair shops, and classrooms that keep Weller soldering irons in daily use. Instead of retiring a worn-out tool, simply swap in a fresh TST4 and keep the job moving.

Weller TST4 Replacement Soldering Iron Tip, .187″ Screwdriver Shape Specifications

• Tip Type: Screwdriver
• Tip Width: 0.187″ (4.75 mm)
• Tip Length: 0.750″ (19.05 mm)
• Compatible With: SP40L, SP40N, WLC100, WP25, WP35, WP40
• Category: Soldering, Desoldering, Rework Tips
• Material: Nickel-plated for durability (assumed based on standard Weller spec)

Why Customers Choose the Weller Replacement .187″ Screwdriver Shape Soldering Iron Tip

Tradespeople and techs often refer to this as the go-to flat solder tip or chisel soldering tip for everyday joints. Its flat blade makes it easier to heat leads or pads without overheating small components. Whether you’re bench soldering or touching up wire ends, the Weller TST4 offers consistent performance and is a commonly searched Weller tip replacement for hobbyist kits and pro shops alike. Keep a few on hand and avoid downtime when your iron needs a fresh edge.