Mushroom Head Half Hollow Rivets

Mushroom head half hollow rivets are different. The wide, low dome has a generous radius at the edge – smooth, rounded, no sharp transition from head to material. It looks like a mushroom – hence the name – and it feels like one too: smooth, finished, safe.

The wide head distributes load evenly over a larger area. The radiused edge prevents cutting or abrasion. And because it is half hollow, the shallow cavity at the tail reduces setting force by about 70% compared to a solid rivet.

Mushroom Head vs. Truss Head – The Edge That Makes the Difference

The difference is the radius. A truss head has a sharper edge – more defined, less rounded. A mushroom head has a smooth, continuous curve from the center to the edge. Run your finger across a mushroom head rivet, and you will feel nothing but a gentle dome.

Choose mushroom head when: The rivet contacts soft materials – leather, fabric, rubber, plastic. The rivet will be near skin or clothing. You need a wide bearing surface but cannot risk cutting or abrading the material. You want the head to look subtle but finished.

Materials and Finishes – What We Offer

Materials: Carbon steel (zinc‑plated), stainless steel (304/316, passivated), brass (C2680), copper (C11000), aluminum (1100/5052/5056)

Finishes: Zinc‑plated, nickel‑plated, passivated, lacquered, black oxide, plain

One Real Application – Heavy Equipment Panel Guard

A manufacturer of heavy construction equipment needed a fastener for attaching steel guard panels to the main frame. The guard panels were subject to vibration, impact, and frequent handling by maintenance crews. The previous round head rivets had sharp edges that caught on work gloves and clothing – a safety concern. Solid rivets provided the strength but required high setting force that distorted the thick panels.

We supplied zinc‑plated steel mushroom head half hollow rivets – 5.0mm shank, 11.0mm head, 12.0mm barrel length. The smooth, radiused edge eliminated sharp edges – no more snagged gloves. The wide head distributed clamping force evenly across the panel. The half hollow cavity cut setting force from 4.0 tons to 1.2 tons – no panel distortion. The customer tested 500 rivets across 50 equipment units. After 12 months of field operation, zero failures. They now order mushroom head half hollow rivets in batches of 200,000 pieces annually.

About Our Factory – Who Makes Your Rivets

We are a Dongguan‑based fastener manufacturer with over a decade of experience in cold heading. Our facility runs 45 cold‑heading machines capable of producing rivets from 0.8mm to 10mm in diameter – from tiny electronic components to larger industrial fasteners.

0.8mm to 10mm diameters – From tiny electronics rivets to larger industrial fasteners. We cover the range.

Standard or custom – We run high‑volume orders on our 45 cold‑heading machines. We also handle custom lengths, non‑standard head profiles, and special finishes. If you have a drawing, we can make it.

Quick sampling – We stock wire for the most common diameters, so we can ship samples in 5–7 days. No waiting weeks to test a rivet.

10+ years of experience on the floor – Our senior technicians have been doing this long enough to know how to hold tolerances that newer operators cannot. They understand how wire behaves, how dies wear, and how to adjust a machine before it drifts out of spec.

Every batch checked – Cavity depth, head geometry, shank diameter, hardness – we verify every batch before it leaves the factory.

Why Customers Choose Us – Real Feedback

We let our customers speak for us. Manufacturers who use our mushroom head half hollow rivets come back to us for the same reasons:

Smooth edge – The radiused profile prevents cutting, tearing, and abrasion. No sharp edges, no field complaints.

Low‑force setting – 70% less force than solid rivets. Protects soft materials and delicate assemblies.

Consistent head geometry – Every batch matches the drawing. The radius is verified, not assumed.

Quick samples, reliable delivery – Samples in 5–7 days. Production on schedule.

We work with manufacturers in heavy equipment, automotive interiors, marine hardware, industrial assemblies, construction, and mining equipment – across North America, Europe, and Asia.

Three Questions We Answer Often

Q: "What is the difference between a mushroom head and a truss head – they both look wide?"

A: The difference is the edge profile. A mushroom head has a large, generous radius at the edge – smooth, rounded, no sharp transition. A truss head has a sharper edge – less radius, more defined. The mushroom head is specifically designed for applications where a sharp edge would cause issues – safety hazards for workers, stress concentration in thick materials, or damage to mating surfaces. The truss head is designed for maximum bearing surface in applications like oversized holes or softer metals. If you run your finger across the edge, the mushroom head will feel smooth and finished; the truss head will feel more defined.

Q: "What is the maximum edge radius you can achieve on a mushroom head half hollow rivet?"

A: The maximum edge radius depends on the head diameter and shank size. For a typical 5mm shank with an 11mm mushroom head, we can achieve a radius of 0.8–1.2mm – smooth enough to prevent snagging and reduce stress concentration. For custom applications requiring a larger radius, we can modify the heading die geometry. The limiting factor is the head height – the radius cannot exceed the head height without compromising the dome shape. Send us your application details – we will recommend the optimal radius for your needs.

Q: "What materials are available for mushroom head half hollow rivets – and which one is best for heavy equipment?"

A: We offer five material families: carbon steel (zinc‑plated, the most common and cost‑effective for heavy equipment), stainless steel (304/316, for outdoor or corrosive environments), brass (C2680, for decorative or electrical applications), copper (C11000, for conductivity), and aluminum (1100/5052/5056, for lightweight applications). For heavy equipment, carbon steel with zinc plating is the standard choice – it delivers the strength needed at the lowest cost, with sufficient corrosion protection for most industrial environments. For extreme conditions, we recommend stainless steel.