High-Performance Tri-lobular Thread Rolling Screws

Trilobular thread-forming screws that squeeze a thread into the base material without chips.

Key specifications

MaterialCarbon Steel
Installationdriven directly into the pilot hole
StandardGB/T 3098.1, company standard (thread forming)
Typical substratesheet metal, aluminium extrusions, castings
Key inspectionsdriving torque, failure torque, hardness

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Product overviewOverview

The cross-section is trilobular: three arcs joined by three lobes. Driven into a prepared hole, the lobes press the base material outward and the metal flows plastically into the thread spaces, forming a matching internal thread. No material is removed, so there are no chips to trap or clear.

Material: Carbon Steel. It is driven straight into the pilot hole.

Key featuresFeatures

Trilobular form creates the thread by displacement, with no chips.
Base material work-hardens at the thread roots, raising strength.
Continuous grain improves fatigue and pull-out resistance.
Pilot hole size must be held closely for the material and thickness.

Typical applicationsApplications

Sheet-metal enclosures and appliance wrappers
Aluminium extrusions and die castings
Automotive interior attachments

Selection notesSelection

Pilot hole diameter follows material and thickness: smaller for soft materials to fill the thread, larger for hard ones to keep torque manageable.

Frequently asked questionsFAQ

How do I specify the High-Performance Tri-lobular Thread Rolling Screws?

Pilot hole diameter follows material and thickness: smaller for soft materials to fill the thread, larger for hard ones to keep torque manageable. Material: Carbon Steel. It is driven straight into the pilot hole.

What matters during installation of the High-Performance Tri-lobular Thread Rolling Screws?

Drive it straight into the pilot hole. Trilobular form creates the thread by displacement, with no chips.

Specifications

Material	Carbon Steel
Property Class	Grade 8.8
Standard	GB/T 3098.1, company standard (thread forming)
Installation	driven directly into the pilot hole
Typical substrate	sheet metal, aluminium extrusions, castings
Key inspections	driving torque, failure torque, hardness

Manufacturing and inspection

Trilobular cross-section and thread form checked optically.We recommend a pilot assembly at the actual torque and mating part before locking the process parameters for volume.