Overview
Custom Double Bend Metal Stamping Sockets (Stainless Steel Clips / Shrapnel) are precision-engineered contact and retention components designed for electrical sockets, PCB terminals, battery contacts, and mechanical fastening applications. Manufactured via high-precision progressive die stamping and secondary forming, these double-bend clips deliver predictable spring force, low contact resistance, excellent fatigue life, and corrosion resistance for demanding automotive, telecom, consumer electronics, and industrial uses. We offer end-to-end OEM services — from DFM, tooling, and prototype runs to high-volume progressive stamping, surface finishing, and assembly.
Characteristics
| Attribute | Details |
|---|---|
| Place of Origin | Xiamen, China |
| Brand Name | OEM / Custom |
| Material Options | Stainless Steel SUS301, SUS304, SUS316; spring-tempered alloys on request |
| Thickness Range | 0.05 mm – 2.0 mm (typical 0.10–1.0 mm) |
| Process | Progressive metal stamping, double-bend forming, secondary forming, coining |
| Tolerance | ±0.01 mm (critical features), ±0.02 mm typical |
| Surface Treatment | Passivation, electropolishing, tin/nickel/silver plating, PVD, black oxide |
| MOQ | Per customer requirement (small proto runs accepted) |
| Sample Lead Time | 5–10 business days (tooling-dependent) |
| Production Lead Time | 2–6 weeks (based on order size & tooling) |
| Inspection | 100% visual + sampling with CMM, contact resistance, spring-force testing |
| Certifications | ISO 9001:2015, IATF 16949 (available), RoHS compliant |
| Packaging | Anti-rust paper, sealed polybags, custom cartons; JIT/Kanban options |
Key Features & Benefits
- Precision Double-Bend Geometry — engineered bends provide consistent retention force and repeatable mechanical performance.
- High Fatigue Life — spring temper and controlled forming deliver stable springback and millions of actuation cycles.
- Low Contact Resistance — metallurgical finishes and optional precious metal plating ensure reliable electrical connectivity.
- Robust Corrosion Resistance — stainless base alloys plus passivation or plating for long service life in harsh environments.
- Scalable Production — rapid prototyping to high-volume progressive stamping with in-house tooling.
Typical Manufacturing Process
- DFM & Tooling — part optimization for progressive die stamping; multi-station progressive die design.
- Blanking & Progressive Stamping — high-speed presses with automated feeders produce formed blanks with double-bend geometry.
- Secondary Forming — precision bending, coining, trimming and piercing operations to final profile.
- Stress Relief & Heat Treatment — where required for spring temper stabilization and fatigue improvement.
- Surface Treatment — pickling/passivation or plating (Sn/Ni/Ag) and optional electropolish.
- Cleaning & Drying — ultrasonic cleaning and controlled drying to remove processing residues.
- Testing & Packaging — electrical, mechanical and environmental tests followed by protective packing.
Surface Treatment Options
- Electro-Tin (Sn) Plating — solderable finish, good corrosion protection.
- Electro-Nickel (Ni) Plating — wear and oxidation resistance, underplate for gold/silver.
- Silver Plating — excellent conductivity for high-current contacts.
- Passivation (Nitric/Chromic) — stainless steel corrosion resistance enhancement.
- Electropolishing — smooth, low-friction surface for improved wear and cleanliness.
- PVD / Black Oxide — aesthetic and thin protective coatings for specific applications.
Quality Assurance & Testing
- 100% Visual Inspection on critical surface and forming defects.
- Dimensional Verification using ZEISS / Mitutoyo CMM and optical comparators.
- Mechanical Tests: spring force curve, insertion/extraction force, hardness and tensile tests.
- Electrical Tests: contact resistance and continuity testing per sample plan.
- Environmental Reliability: salt spray (ASTM B117), humidity, and thermal cycling as required.
- Fatigue Life Validation: cyclic actuation testing to customer-specified cycles.
- Traceability: lot coding, material certificates (MTC) and full process control documentation.
Factory Capabilities
Our metal-stamping campus is equipped with 25 high-performance punch presses (25–300 tons), precision progressive die design and manufacturing, CNC wire EDM, coil-feed progressive lines with automated feeders, secondary forming cells, ultrasonic cleaning, and in-house plating lines. Inspection lab includes CMM, salt-spray chambers, contact resistance benches, and fatigue rigs. We operate under ISO 9001 and IATF 16949 protocols and support rapid prototyping, PPAP, and long-term supply agreements.
