High-Performance Tri-lobular Thread Rolling Screws

Product Description

High-Performance Tri-lobular Thread Rolling Screws are designed for aluminum and magnesium die-cast components. Instead of cutting a thread, they roll one: the tri-lobular cross-section displaces material as the screw advances, forming a precise mating thread in the casting.

Rolling rather than cutting produces a stronger thread in the parent material, because the metal is compressed and work-hardened around the formed thread instead of being removed. Forming also generates no chips, which keeps the assembly clean — an important consideration in sealed battery and electronic enclosures.

The resulting interference fit acts as a locking feature: the rolled thread grips the screw along its full engagement, giving exceptional self-locking and anti-loosening performance under dynamic loads. And because no secondary tapping operation is required, assembly throughput improves and manufacturing cost falls.

Key Features & Benefits

• Tri-Lobular Cross-Section: Displaces material to form precise mating threads in die-castings.
• No Pre-Tapping Required: Eliminates a secondary operation and the associated cost and equipment.
• Chip-Free Thread Forming: Keeps assemblies clean, with no loose swarf in sealed enclosures.
• Self-Locking Interference Fit: Rolled thread engagement resists loosening under dynamic load.
• Stronger Thread in the Casting: Material is compressed and work-hardened instead of cut away.
• Streamlined Assembly: Faster, simpler fastening for high-volume light alloy production.

Application Industries

A definitive solution for high-efficiency fastening in non-ferrous metals, these screws secure aluminum and magnesium alloy enclosures in new-energy-vehicle battery packs.

They are equally suited to light alloy die castings across other industries, including telecommunications housings, motor housings and electronic enclosures, where direct fastening without tapping shortens the production flow.