Coil Spring for GMC Sierra: Sintered Metal
This coil spring for the GMC Sierra is specified around sintered metal, which decides how it behaves in service far more than the part name does. We build to a written specification — base material, dimensions, finish and packing — and hold that specification on file so every reorder reproduces the approved piece.
The usual reason a programme changes supplier is not unit price. It is documentation that arrived after the container shipped, or packing that arrived crushed at the port. Both are specification problems, and both are preventable.
Specification
| Product | Coil Spring |
|---|---|
| Vehicle application | GMC Sierra |
| Material / finish | Sintered Metal |
| Typical use | Heavy Load Hauling |
| MOQ | 500 pieces per specification |
| Sampling | 14 working days, 5 days per revision |
| Bulk lead time | 25-40 days after approval |
| Compliance | ECE R90 |
| Packing | 10 pieces per inner box, 1000 per carton |
Material options
- Stainless Steel — used when the finish has to hold a coating
- Carbon Fibre Composite — the cost-effective default for volume programmes
- Reinforced Nylon — chosen where wear resistance comes first
- Polypropylene — specified where the part sits close to a heat source
- Nylon 66 — chosen where wear resistance comes first
Processes available
- precision stamping
- surface grinding
- shot blasting
- heat treatment
- CNC machining
- electroplating
Fitment notes
Keep the old part until the new one is on the bench. Comparing them side by side settles questions a photograph never will.
Where it is used
The specification above is the one most often ordered for heavy load hauling. Related applications include coastal delivery, farm use, rental fleets, delivery fleets, food delivery.
Quality and packing
- In-line inspection with AQL 2.5 sampling on every lot.
- Dimensional report issued against the approved drawing.
- Carton marking and barcode to your specification.
- Golden sample retained at the factory as the reorder reference.
Questions buyers ask
How is packing specified?
Individual packing, inner box quantity and carton marking are confirmed at quotation stage so the cartons arrive ready for your warehouse.
How long does sampling take?
Samples leave the factory in 14 working days, and each revision round adds about 5 days once you have seen the first piece.
Can the specification be held on file?
Yes. Once approved, the specification is recorded against your part number so a reorder reproduces the ECE R90-compliant build instead of a fresh interpretation.
Can you match an existing sample?
Send a sample and we will reverse-engineer the specification, then produce a counter sample for approval before any bulk starts.
Share a sample or a drawing and we will quote against a written specification, not against a photograph.
