Multi-Drum Blind Rivet with Round Head – Product Introduction

The multi-drum blind rivet with round head is a high-performance fastener designed for single-side riveting, manufactured according to the original YJT 1046 technical specifications, with common models such as YJT 8009. Its core feature is that during pull riveting, the rivet body tail is induced by a specialized structure to fold and form 2 to 3 independent drum-shaped rings (resembling a “lantern” shape), rather than simply expanding. Combined with a low-profile round head design, it can provide extremely large bearing area and uniform clamping force without damaging the connected components, while also offering certain sealing and vibration-damping functions. The material typically uses high-plasticity aluminum alloy rivet body (such as 5052) combined with carbon steel or stainless steel mandrel, widely applied in automotive, electronics, home appliances, and light building materials for connecting soft, brittle, and thin-walled materials.

I. Product Features

Multi-Drum Folded Formation: During pull riveting, the rivet body tail sequentially folds into multiple drum-shaped rings, distributing the locking force across multiple bearing surfaces, forming “multi-point support” and significantly reducing single-point pressure.

Round Head Smooth Profile: The rivet head features a wide, flat, rounded shape. After installation, the appearance is neat without protrusions, meeting the surface requirements for interior and exterior components.

High-Plasticity Rivet Body Material: The rivet body commonly uses 5052/5056 aluminum alloy with excellent ductility, ensuring full multi-drum folding without cracking, while also providing corrosion resistance.

Blind End Self-Locking Structure: After the mandrel breaks, the fracture surface is flush with the interior of the drum-shaped body. The residual mandrel forms auxiliary locking, preventing loosening and abnormal noise.

Standard Break-Neck Groove Control: The mandrel has a pre-set precision break groove that automatically breaks the mandrel when the set pulling force is reached. The riveting force consistency is excellent, and operation requires no experience-based judgment.

II. Product Advantages

Non-Damaging Grip on Soft Materials: The multi-drum structure distributes the locking force, effectively preventing low-strength materials such as plastics, fiberglass, and wood from being crushed or deformed. It is the preferred choice for “soft connections.”

Ability to Compensate for Oversized Holes: The drum-shaped body has a large expansion range, capable of reliably filling elliptical, oversized, or burr-containing holes, and can achieve “retained riveting” to prevent rivet detachment.

Auxiliary Sealing and Leak Prevention: Multiple drum-shaped rings fit tightly against the hole wall, forming multiple contact barriers with certain waterproof, dustproof, and gas sealing effects.

Vibration Damping and Noise Reduction: The drum body clamping surface has elastic contact, effectively absorbing vibration energy and reducing loosening and metal friction noise caused by vibration.

Improved Assembly Cycle: Compatible with various standard pull rivet guns, single-side operation, completed in seconds, and the drum body formation status can be visually inspected for intuitive quality control.

III. Applications

Automotive and Motorcycle Manufacturing: Connection of lamp bases to plastic lamp housings, bumper trim strips, wheel arch guards, inner door panel clips, and sound insulation cotton fixation.

Home Appliances and Consumer Electronics: Washing machine inner tub balance rings, refrigerator liner fixation, air conditioner outlet plastic parts, computer chassis panels, and handheld device housings.

Rail Transit and Bus Interiors: Fixation of compartment wall panels, luggage rack bases, thermal insulation laminates, and composite flooring.

Wood Products and Furniture: Office chair back mesh to plastic frames, drawer slides to wooden side panels, and panel furniture connectors.

Ventilation and Thermal Insulation Engineering: Thin galvanized duct flange connections, thermal insulation cotton compression pads, and fiberglass panel assembly.

Sports and Rehabilitation Equipment: Treadmill instrument racks, scooter pedals, wheelchair plastic guards, and other areas requiring flexible fastening.