Knurled Blind Rivets (Electrical Earthing)
Knurled blind rivets — conical notches that lift the paint or plating on the sheets as they set, cutting through the finish to bond the joint electrically. The earthing rivet for coated panels: a grounded connection without sanding the paint first, with rotation and loosening locked by the knurl.
Last updated: 2026-11
Specifications
The knurled blind rivet is an electrical part first: its body carries conical notches that, on setting, lift the paint or plating finish on the metal surface and cut through to bare metal, so the set rivet bonds the sheets electrically through the coating instead of despite it. The collected manufacturer line states the purpose directly — electrical conductivity between the assembled components, and earthing of coated metal sheets without sanding — and adds that the rivet fastens so tightly as to prevent unscrewing and rotation, the knurl doubling as the anti-rotation lock. That changes the joint design entirely: an enclosure or lighting fitting can be painted first and earthed at assembly, removing the mask-and-sanding steps a bolted earth stud demands. Set with standard blind-rivet tooling; a set version with a tag is available in the line for wire or terminal attachment. The collected aluminium-body / zinc-plated-steel-mandrel series publishes one tabulated row (4.0 × 8 mm, shear 1200 N / tensile 1800 N, drill 4.2, grip 0.5–4.0) with other lengths, coloured rivets and steel/steel variants offered beyond it — for earthing duty the joint should still be verified with a continuity test after setting, since the published claim is conductivity by design, not a milliohm specification.
| Type | Knurled blind rivet — conical notches lift the paint/plating finish on setting for electrical continuity |
|---|---|
| Function (manufacturer line) | Electrical conductivity between assembled components; earthing of coated metal sheets without sanding |
| Anti-rotation | The rivet fastens so tightly as to prevent unscrewing and rotation |
| Tagged version | Can be set with a tag — for wire or terminal attachment points |
| Published series row (aluminium body / zinc-plated steel mandrel) | 4.0 × 8 mm: dk 8.0, drill 4.2, grip 0.5–4.0 mm, tensile 1800 N, shear 1200 N |
| Series scope | Other lengths, coloured rivets and steel/steel variants offered beyond the tabulated row |
| Verification note | Conductivity is a design claim — verify earthing joints with a continuity test after setting |
| Applications (manufacturer line) | Electrical and lighting equipment, neon lights, coated-sheet earthing |
| MOQ / lead time | 10,000–50,000 pieces by size; 10–20 days |
Materials
- Aluminium body / zinc-plated steel mandrel
- Brass body / steel mandrel
- Steel body / steel mandrel
Ordering & documentation
Documents
Shipments are backed by Mill Test Certificate (MTC), Dimensional Report, Salt Spray Test Report on request, with full batch traceability from raw material to finished product. Quality management follows the owner-confirmed compliance list: ISO 9001:2015, RoHS, REACH. Exact document sets are confirmed on the order.
Quotation
- The fastener family (Knurled Blind Rivets (Electrical Earthing)) plus the standard designation from your drawing — DIN / ISO / JIS / ASTM / ANSI, or a drawing for custom parts.
- Size (diameter and length), thread type (metric or inch), property class or grade, and coating or finish.
- Quantity per size and your target delivery date.
- Destination country, and any required documents (for example a mill test certificate) so the quote includes them.
Sample & supply
Minimum order quantity is 10,000–50,000 pieces depending on size. Standard production run 10–20 days. Quantities or variants outside the standard range are confirmed at quotation.
Storage & shipping
Parts are packed for export and shipped factory-direct to buyers in Europe, Asia, the Americas and the Middle East. Store fasteners dry and protected until installation, and keep coated parts in their packaging until use; specific packing and preservation requirements can be stated on the order and confirmed at quotation.
Frequently asked questions
Why a special rivet for earthing — can't I just use a standard one through cleaned metal?
You can — if the joint stays bare. The knurled earthing rivet exists because most production sheet is painted, plated or anodized, and every standard rivet set through a coating insulates the joint: the paint remains in the interface unless it is sanded off first. The conical notches cut through the finish as the rivet sets, bonding metal-to-metal in one operation on the finished panel — the manufacturer line names earthing of coated sheets without sanding as the design purpose. The practical rule: treat the set joint as an earth point to be verified (continuity test), and reserve it for earthing duty, not current-carrying connections.
What is the MOQ and lead time for these rivets?
Minimum order quantity is 10,000–50,000 pieces depending on size and material. Standard production lead time is 10–20 days. Common blind rivet sizes are widely stocked — confirm the exact schedule against quantity and size mix at quotation.
What should an RFQ for these rivets state?
State the rivet subtype (open-end, closed-end, structural blind rivet or rivet nut), body diameter, grip range or total material thickness, head style (dome, countersunk or large flange), body and mandrel materials (for example aluminum body with steel mandrel, or all-stainless), finish, required certificates such as a mill test report per EN 10204 3.1, and quantity per size — plus destination country.
Request a Quote
Get factory-direct pricing from the manufacturer.
What to include in your inquiry
- ✓ Standard and property class (e.g. DIN 912, ISO 4762, class 8.8) — or a drawing for custom parts.
- ✓ Sizes, lengths and thread type (metric or inch).
- ✓ Quantity per size and your target delivery date.
- ✓ Destination country, plus any coating or finish requirement.
- ✓ Any documents you need with the shipment (e.g. mill test certificate) so the quote includes them.
- ✓ Your inquiry goes straight to the factory team by email and gets a reply within 24 hours.
- ✓ Factory-direct pricing
- ✓ Standard and custom specifications
- ✓ Factory-direct export to buyers in Europe, Asia, the Americas and the Middle East
- ✓ Full fastener family support