Aluminum Half Tubular Rivets

Aluminum half tubular rivets are the fastener you choose when weight matters more than cost. At roughly one‑third the weight of steel, they are the lightest option in the half tubular rivet family. Non‑magnetic, naturally corrosion‑resistant, and available in multiple alloys to match your strength requirements.

When every gram counts and you need a permanent, low‑force fastener, aluminum half tubular rivets are the logical choice.

Materials, Alloys & Finishes – What We Offer

Finishes explained:

• Plain (as‑formed) – Natural silver, general purpose, indoor use
• Clear anodized – Enhanced corrosion protection, clean appearance
• Color anodized – Brand identity, decorative, identification
• Chem‑film (Alodine) – Corrosion protection, paint base

Head Styles – What We Offer

Round, Flat, Oval, Countersunk, Truss, Mushroom.

Custom head dimensions available upon request.

One Real Application – Lightweight Hiking Equipment Assembly

A manufacturer of lightweight hiking and camping equipment needed a fastener for assembling trekking pole handles and tent pole joints. The previous steel rivets added unnecessary weight – every gram counted for ultralight backpackers. Solid aluminum rivets provided the weight saving but required high setting force that damaged the lightweight alloy tubing. The customer needed a fastener that would set with low force, hold securely in the field, and survive outdoor conditions.

We supplied 5052 aluminum half tubular rivets – 3.0mm shank, 5.5mm round head, 5.0mm barrel length, clear anodized finish. The shallow cavity reduced setting force by over 60% – no damage to the lightweight tubing. The aluminum rivets reduced fastener weight by 65% compared to steel. The anodized finish provided corrosion protection for outdoor use. The customer tested 500 rivets across 250 pieces of equipment. After 5,000 field cycles, zero failures. They now order our half tubular rivets in batches of 150,000 pieces annually.

Why Half Tubular Rivets Crack During Setting – And How We Prevent It

A rivet that cracks during setting is one of the most common frustrations we hear about. Here is why it happens – and how we design our half tubular rivets to prevent it.

Cause 1: Cavity depth is too deep

If the cavity exceeds 55% of the barrel length, the remaining wall is too thin to support the rolling action. The metal folds instead of rolling – and cracks. Our solution: We control cavity depth to exactly 45–55% of barrel length on every batch.

Cause 2: Material hardness is inconsistent

Aluminum that is too hard cracks during forming; aluminum that is too soft deforms unevenly. Our solution: Every coil is hardness‑tested before production. We reject any coil outside specification for its alloy grade.

Cause 3: Hole size is too tight

If the hole is undersized, the barrel is compressed excessively during insertion – the wall cracks before setting even begins. Our solution: We specify the correct hole size (shank + 0.15–0.20mm) and provide a setting guide with every order.

Cause 4: Setting force is too high or uneven

Half tubular rivets only need 25–30% of the force required for solid rivets. Excessive or uneven force cracks the thin wall. Our solution: We recommend the optimal setting force for your rivet size and material – and can supply matched setting tools to ensure even pressure.

Cause 5: Tooling is worn or mismatched

Worn or incorrectly shaped setting punches create uneven pressure points. Our solution: Our setting tools are matched to our rivet dimensions and maintained with polished, wear‑resistant surfaces.

The result: a clean, symmetrical clinch on every rivet – no cracks, no weak spots, no field failures.

Our Customization Process – From Inquiry to Delivery

Sample lead time: 5–7 days standard; custom tooling: 15–20 days.

Our Certifications – Proof of Quality

We maintain full traceability and quality documentation for every batch of aluminum half tubular rivets:

• ISO 9001:2015 – Certified quality management system
• RoHS compliance – Verified by SGS third‑party testing
• REACH compliance – Current SVHC declaration
• SGS test reports – Available upon request for specific batches
• Material certificates – Mill test certificates traceable to original coil

All certifications and test reports are available for download or upon request. We believe in full transparency – what we claim, we can prove.

Three Questions We Answer Often

Q: "Can I get samples before ordering production quantities?"

A: Yes – we offer samples for all our products. For standard existing specifications, samples are provided free of charge – you only pay the shipping cost. For custom sizes or custom tooling, sample availability and lead time depend on the specific requirements. Please contact our sales team with your drawing or specification, and they will advise on sample cost and delivery timeline.

Q: "What is the difference between aluminum and steel half tubular rivets in terms of setting force?"

A: The setting force reduction is the same for both – about 70% less than solid rivets of the same diameter. The difference is in weight and strength. Aluminum half tubular rivets weigh one‑third of steel, making them ideal for weight‑sensitive applications. Steel offers higher tensile strength (400–500 MPa vs 90–350 MPa for aluminum) and lower cost. Choose aluminum for lightweight and corrosion resistance; choose steel for strength and budget.

Q: "How do I select the correct alloy for my application?"

A: The choice depends on your strength requirements and environment. 1100 – Use for non‑structural, decorative, and lightweight enclosure applications where strength is not critical. 5052 – Use for general‑purpose assemblies where moderate strength and corrosion resistance are needed. 5056 – Use for higher‑strength requirements, marine environments, and structural applications where maximum strength in a lightweight fastener is required. If you are unsure, send us your application details – we will recommend the right alloy based on your load requirements and environmental conditions.