This is a ready-to-ship collection of stamped spring clips with zinc plating for corrosion resistance. You get consistent clamping force across batches, with dimensional tolerance held to ±0.05 mm and
This is a ready-to-ship collection of stamped spring clips with zinc plating for corrosion resistance. You get consistent clamping force across batches, with dimensional tolerance held to ±0.05 mm and hardness from 45 to 50 HRC after heat treatment. Lead time is 7 days for standard sizes, and we keep 20,000 pieces in stock for immediate sampling.
Zinc plating adds 8 to 12 microns of protective coating, which is enough to pass a 48-hour neutral salt spray test. The plating is applied after heat treatment, so the base metal's spring properties remain unchanged. We use a trivalent passivation process, which gives a bright finish and avoids the environmental issues of hexavalent chromium. This means your clips can sit in humid storage or outdoor assemblies without surface pitting, while still delivering the same deflection force as unplated versions.
We start with either 65Mn spring steel or SK5 high-carbon steel, both in strip form from certified mills. After stamping, parts go through oil quenching at 830°C and tempering at 400°C to hit the target hardness range. The result is a component that can cycle 100,000 times without fatigue failure under normal load. For corrosive environments, we also offer 301 stainless steel clips, but the zinc-plated carbon steel options give you the best cost-to-performance ratio.
| Specification | Value |
|---|---|
| Material Options | 65Mn, SK5, 301 Stainless Steel |
| Zinc Plating Thickness | 8–12 microns |
| Hardness (after heat treat) | 45–50 HRC |
| Dimensional Tolerance | ±0.05 mm |
| Surface Finish (base metal) | Ra 0.8 μm |
| Burr Height (max) | 0.05 mm |
| Flatness | 0.1 mm |
| Max Strip Width | 200 mm |
| Max Feed Length | 300 mm |
| Standard Lead Time | 7 days |
| MOQ | No MOQ (samples available) |
We run high-speed presses at 400 strokes per minute, using progressive dies with 12 to 16 stations. Each station performs a specific operation like piercing, forming, or coining. The die is made from D2 tool steel, hardened to 60 HRC, and we inspect it for wear every 20,000 strokes. This control ensures that every clip in your batch has the same internal radius and bend angle, which directly affects the spring-back and final clamping force.
Thin material, typically 0.3 to 1.5 mm thick, is prone to burr formation at the shear line. We limit burr height to 0.05 mm maximum, which is critical for parts that will sit against electrical contacts or plastic housings. After stamping, we run a vibratory deburring step for 15 minutes, using ceramic media. This gives a slight edge radius without altering the critical dimensions. If your application needs a completely smooth edge, we can add a micro-finishing pass, but standard clips already meet most automotive and appliance specifications.
Every batch is checked for hardness using a Rockwell tester on two samples per 500 pieces. Dimensional checks use a CMM with a resolution of 0.001 mm, and we verify the zinc coating thickness with an X-ray fluorescence gauge. We also perform a 10,000-cycle deflection test on one sample per lot to confirm the spring rate hasn't shifted. The inspection report, which includes all these data points, is shipped with the goods. You don't need to ask for it; it's standard practice here.
We don't force you into bulk quantities. You can order 50 pieces or 50,000 pieces, and the unit price will adjust based on volume. For samples, we keep common sizes like 10 mm, 15 mm, and 20 mm width in stock. If you need a custom shape, we can make a sample set from a simple drawing within 5 days, charging only the tooling cost for the prototype die. After you approve the sample, production tooling takes about 2 weeks to build.
These clips are designed to work with standard shaft diameters and panel thicknesses. For example, a clip with an internal diameter of 5 mm will grip a 5 mm shaft with a retention force of 15 to 20 Newtons. We provide a force-deflection curve for every custom design, so you can verify the fit before placing a large order. This data is useful when your engineers are calculating assembly push-in force or removal force for maintenance access.
There is no MOQ; you can start with a single sample order or go straight to production volume.
Yes, we can adjust width, length, bend angle, and material grade, but changes to the internal geometry may require a new die, which adds 2 weeks to the lead time.
We use SPC (Statistical Process Control) on key dimensions, measuring every 200th piece, and we stop the press immediately if any reading falls outside the control limits.
For a standard zinc-plated clip, 10,000 pieces take 7 working days from material confirmation to shipment.
If you're currently using off-the-shelf clips, a custom die might reduce your assembly cost. For example, we can combine the clip with a spring washer or a grounding tab in one stamped piece, eliminating a separate component. This reduces your inventory count and shortens assembly time. The die cost pays back quickly when your volume exceeds 20,000 parts per year. We'll help you evaluate that trade-off with a free cost analysis.
Zinc plating is durable, but we still package clips in anti-rust VCI paper and sealed plastic bags to prevent white rust during transit. For export orders, we use cartons with a moisture barrier. If you plan to store the clips for more than six months, keep them in a dry environment below 60% relative humidity. We also label each box with the batch number and heat treat code, so you can trace the material back to the original coil.
When you're integrating these clips into a larger assembly, it's worth reviewing the tolerances and tooling maintenance requirements. Our CNC cutting tool selection guide covers how to match tooling materials to your production volume and batch size. For a deeper look at the limits of our stamping process, the CNC machining tolerances guide explains what features we can hold at ±0.02 mm versus looser standards. Both guides are written for engineers who need practical numbers, not theory.
Send us your part drawing or the dimensions of the clip you need. We'll review it for manufacturability, suggest any cost-saving changes, and send you a firm quote within 12 hours. For urgent inquiries, contact us directly at sc@bquq.com or on WhatsApp at +86 13713157787. We're based in Dongguan, China, and we've been doing precision manufacturing for 20 years. No MOQ, no minimum order pressure, just clear answers and fast delivery.
| Parameter | Capability |
|---|---|
| Materials | SPCC, SGCC, SUS301/304/316, brass, copper, beryllium copper, phosphor bronze |
| Process | Progressive die stamping, fine blanking, deep drawing, bending, tapping |
| Tolerance | ±0.01mm standard, ±0.005mm on request |
| Surface | Zinc plating, nickel, tin, gold, powder coating, passivation, anodizing |
| Die Size | Up to 1200 x 800 mm, 16-250 ton presses |
| Thickness | 0.05 - 6.0 mm sheet metal, wire 0.1 - 8.0 mm |
| Prototype | 7-15 days tooling, no MOQ on samples |
| Inspection | Full report per batch, CMM and optical measurement |
