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How to Choose the Right SS Cap Rivet Size: Complete Sizing Guide 2026
Choosing the correct SS cap rivet size is critical for creating strong, clean joints. The wrong size leads to weak connections or wasted material. This guide explains the sizing system and helps you select the perfect size.
Understanding SS Cap Rivet Size Notation
SS cap rivet sizes are expressed as two numbers separated by a slash, for example 4/8 or 5/12:
- First number (Cap Diameter) — The diameter of the stainless steel cap in millimetres (4mm, 5mm, 6mm)
- Second number (Rivet Length) — Total length of the aluminium shaft in millimetres
SS Cap Rivet Size Chart
| Size | Cap Dia | Length | Best For |
|---|---|---|---|
| 4/8 | 4mm | 8mm | 1-3mm thin panels, light signage |
| 4/10 | 4mm | 10mm | 3-5mm standard furniture panels |
| 4/12 | 4mm | 12mm | 5-7mm thicker panels, double layer |
| 5/10 | 5mm | 10mm | 3-5mm wider cap coverage |
| 5/12 | 5mm | 12mm | 5-7mm standard industrial use |
| 5/14 | 5mm | 14mm | 7-9mm heavy duty |
| 6/12 | 6mm | 12mm | 5-7mm large cap coverage |
| 6/14 | 6mm | 14mm | 7-9mm heavy duty large cap |
| 6/16 | 6mm | 16mm | 9-12mm maximum thick assemblies |
How to Calculate the Right Rivet Length
Required Length = Total Material Thickness + 2-3mm (for flaring)
Example: Two 3mm sheets (total 6mm) need a rivet length of 8-9mm. Choose 4/8 or 5/10.
Cap Diameter Selection Guide
- 4mm caps — Discreet, minimal visual footprint. Subtle applications.
- 5mm caps — Most popular. Good balance of visibility and holding force.
- 6mm caps — Maximum coverage and strength. Heavy-duty and decorative.
Common Mistakes to Avoid
- Too short — Won’t flare properly, weak joint
- Too long — Oversized ugly flare, wasted material
- Wrong drill bit — Use 0.1-0.2mm larger than rivet body diameter
Order Any Size from Kamlesh Enterprises
Kamlesh Enterprises manufactures all sizes from 4/8 to 6/16 in SS 202 and SS 304 grades. Custom sizes on request. Check pricing or call +91 90225-54368.