What are Multi-Grip Rivets?
Multi-grip rivets are blind rivets designed to cover a wider stack thickness with a single part number. A rivet tool pulls the mandrel to flare the body in a tight hole, clamping the joint from one side. The extended grip range lets one size replace several standard sizes, which simplifies inventory and speeds setup.
When should I use multi-grip rivets?
- Projects with varying stack thickness across parts or builds
- Mixed materials or repairs where holes may be slightly oversized
- Production lines that want fewer size changeovers and faster picks
- Field service kits that need broad coverage with minimal SKUs
How to choose the right size
- Grip range: Match the rated range to the total material stack thickness. If the stack is near the limit, move up to the next range.
- Diameter and hole size: Use the manufacturer’s drill size. Keep the hole just over body diameter and deburr both sides for a strong set.
- Head style: Dome for general use, large flange to add bearing on thin or soft materials, countersunk for a flush surface.
- Materials: Aluminum (low weight), steel (economy strength), stainless (corrosion resistance). Consider galvanic compatibility with the joined metals.
What drill size for 1/8 in and 3/16 in multi-grip rivets?
Confirm with the chart for the exact series. Keep the hole just over the body diameter and deburr both sides for consistent setting.
| Nominal rivet diameter | Recommended hole size (in) | Common drill size |
|---|---|---|
| 3/32 in | 0.097 – 0.100 | #41 |
| 1/8 in | 0.129 – 0.133 | #30 |
| 5/32 in | 0.160 – 0.164 | #20 |
| 3/16 in | 0.192 – 0.196 | #11 |
| 1/4 in | 0.257 – 0.261 | Letter F |
Notes: Always verify the drill size for the specific rivet series you are using. Maintain a snug, clean hole and deburr both sides to improve clamp and retention.
Common sizes, materials and finishes
- Popular diameters: 1/8, 5/32, 3/16, 1/4 in
- Typical grip ranges: about 1/16 in to 1/2 in+, depending on diameter and series
- Bodies and mandrels: aluminum, steel, stainless; plain or coated finishes
- Heads: dome (low profile), large flange, countersunk
Installation and best practices
- Measure the total stack and choose a rivet whose grip range covers it.
- Drill square to the surface, then deburr both sides. Use the recommended drill size.
- Insert from the finished side and support the joint to limit pillowing.
- Pull the mandrel until it snaps. Avoid over-pulling on thin sheet.
- For sealing requirements, select a closed-end style in a separate category or apply a compatible sealant.
Common issues and quick fixes
- Loose set or rocking, the stack is outside the grip range. Choose the next range or larger diameter.
- Rivet spins in the hole, the hole is oversized. Step up diameter or use large flange for added bearing.
- Pull-through on thin sheet, switch to large flange or add a backing washer where appropriate.
Why buy Multi-Grip Rivets from AlbanyCountyFasteners.com
- Broad selection of diameters, head styles, and wide grip ranges
- Options across aluminum, steel, and stainless to match your environment
- Fast shipping, bulk pricing, and contractor-friendly pack sizes
- USA-based support for drill sizes, grip selection, and installation tips
FAQs
Quick answers to high-intent questions on sizing and use of multi-grip rivets.
What makes a multi-grip rivet different from a standard rivet?
A single multi-grip part number covers a wider stack thickness, so it can replace several standard sizes and still set securely in a snug, deburred hole.
When should I choose multi-grip over open end?
Use multi-grip when stack thickness varies, when you want fewer size changeovers, or when holes may be slightly oversized. Use open end for consistent, known stacks.
What drill size should I use for 1/8 in and 3/16 in?
Use the table above for common pairings, and confirm the exact drill size in the datasheet for your rivet series. Keep the hole just over body diameter and deburr both sides.
Do multi-grip rivets seal against water?
Not by design. For sealing needs, choose closed-end blind rivets or use a suitable sealant along with correct hole sizing.
Are stainless multi-grip rivets good for outdoor or marine use?
Yes, stainless provides strong corrosion resistance. If joining dissimilar metals, isolate them to reduce galvanic corrosion.