What is a Crownsert?

Crownserts are precision-engineered, thin-walled swaged threaded inserts that create strong, wear-resistant internal threads in lightweight parent materials—most commonly aluminium and magnesium. By reinforcing softer metals without adding bulk, they’re a smart choice wherever high strength and weight reduction both matter.

• Lightweight strength: Adds durable threads with minimal mass and small boss size.
• Space-constrained designs: Compact one-piece geometry fits tight envelopes.

• OEM and MRO: Ideal for new assembly, thread repair, and retrofit work.
• Demanding industries: Aerospace, automotive, machinery, electronics housings, fixtures, and more.

1. Drill & counterbore: Prepare the hole to the recommended dimensions.
2. Tap: Cut a standard internal thread.
3. Seat: Place the insert into the tapped hole.
4. Swage to lock: Form the knurled upper collar into the counterbore wall. This swaging action locks the insert against rotation and pull-out—even under vibration and repeated cycles.

Crownserts are available in locking and non-locking versions, with multiple materials and finishes to match your environment and performance requirements, such as corrosion resistance, service temperature, or torque-out targets.

• Reliable thread reinforcement in aluminium and magnesium
• High-strength performance with minimal added weight
• Streamlined drill–tap–install–swage installation with standard tooling

• Excellent resistance to vibration, torque-out, and pull-out
• Perfect for thread repair to restore original size and load capability

What materials are best for Crownserts?

They’re optimized for aluminium and magnesium but can be used in other alloys where thread strength and weight savings are required.

Should I choose a locking or non-locking style?

Use locking for joints subject to vibration or where prevailing torque is required. Choose non-locking for smooth assembly/disassembly when prevailing torque isn’t needed.