Q403-1-40 - Tregaskiss 403-1-40 TOUGH LOCK Heavy Duty Contact Tip .040 (10-Pack)

Industrial-Grade Precision for High-Volume Welding

The Tregaskiss 403-1-40 TOUGH LOCK™ Heavy Duty Contact Tip is a premium consumable designed to meet the rigorous demands of industrial robotic and semi-automatic MIG welding environments. Engineered specifically for use with .040" (1.0 mm) welding wire, this contact tip is a core component of the renowned TOUGH LOCK™ Consumable System. This system is widely adopted in automotive, heavy equipment, and general fabrication sectors due to its reliability and thermal management capabilities.

At the heart of the 403-1-40's performance is the patented Dual Taper Technology. Unlike traditional threaded tips that can loosen due to thermal cycling and vibration, the TOUGH LOCK tip mates with the retaining head (diffuser) using a tapered interference fit. This design maximizes surface contact area, ensuring exceptional electrical conductivity and efficient heat transfer away from the arc zone. The result is a contact tip that runs cooler, resists micro-arcing, and maintains a stable arc over extended duty cycles.

This "Heavy Duty" variant features increased mass and wall thickness compared to standard duty tips, making it suitable for high-amperage applications where heat buildup is a critical factor. The tips are manufactured from high-quality copper alloys with tight tolerance bores to ensure consistent wire feeding and electrical contact. Supplied in a pack of 10, these tips provide a cost-effective solution for maintaining production uptime and weld quality.

Technical Specifications

• Part Number: 403-1-40


• Wire Compatibility: .040 inch (1.0 mm)


• System Compatibility: Tregaskiss TOUGH LOCK™


• Construction: Heavy Duty Copper Alloy


• Mounting Style: Dual Taper (Non-threaded locking)