Custom Made Special Steel Threaded Inserts Black Oxide Nickel Plating Geomet Coating
Custom Made Special Steel Threaded Inserts Black Oxide Nickel Plating Geomet Coating
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Steel Threaded Inserts – Surface Treatments & Specifications
Key Parameters for Specification
Corrosion Resistance :
Salt spray test hours (e.g., Zinc: 96–500 hrs; Geomet®: 1,000+ hrs).
Thickness :
Zinc plating: 5–25 µm; Nickel: 10–50 µm.
Hardness :
Nickel plating: ~500 HV; Black oxide: No significant change to base metal.
Compliance :
RoHS, REACH, ASTM B633 (zinc/nickel plating), AMS 2700 (passivation).
Material Pairing Guide
Carbon Steel Inserts : Use zinc/nickel plating or black oxide.
Stainless Steel Inserts : Opt for passivation or Geomet® coating.
Example :
M6 Stainless Steel Insert with passivation → Food processing equipment.
#10-24 Carbon Steel Insert with zinc plating → Automotive interior panels.
Here are 5 excellent cases of Steel Threaded Inserts across industries, highlighting their material, surface treatment, and functional advantages:
- Automotive: Engine Component Fastening
Insert Type : Carbon Steel, M8 x 1.25 (Metric Fine Thread)
Surface Treatment : Geomet® Coating (Zinc-Flake)
Why It Works :
Withstands 1,000+ hours salt spray resistance (critical for underhood parts).
Coating reduces friction during installation, preventing thread galling.
Application : Threaded inserts in aluminum engine blocks for spark plug mounts.
- Aerospace: Composite Panel Reinforcement
Insert Type : Stainless Steel (A286) , #8-32 UNC Thread
Surface Treatment : Passivation (AMS 2700)
Why It Works :
High-temperature resistance (up to 1,300°F/700°C ) for jet engine housings.
Passivation prevents crevice corrosion in composite-metal joints.
Application : Inserts in carbon fiber panels for avionics mounting.
- Electronics: Ruggedized Device Enclosures
Insert Type : Stainless Steel 304 , M3 x 0.5
Surface Treatment : Nickel Plating (5–10µm)
Why It Works :
EMI shielding due to conductive nickel layer.
Resists humidity and repeated disassembly (e.g., military radios).
Application : Threaded inserts in aluminum laptop casings for screw retention.
- Furniture: High-Load Assembly
Insert Type : Carbon Steel , M6 x 1.0 with Knurled OD
Surface Treatment : Black Oxide
Why It Works :
Knurling provides 360° anti-rotation in hardwood.
Black oxide blends aesthetically with wood finishes.
Application : Inserts in oak table legs for bolted joints.
- Medical: Sterilizable Equipment
Insert Type : Stainless Steel 316L , #6-32 UNC
Surface Treatment : Electropolished + Passivation
Why It Works :
Smooth surface minimizes bacterial adhesion (meets FDA/ISO 13485 ).
Survives autoclave sterilization (steam, chemicals).
Application : Inserts in surgical instrument handles.
Key Takeaways :
Corrosion Resistance : Geomet® for automotive, passivation for aerospace/medical.
Strength : Stainless steel (A286/316L) for extreme environments.
Aesthetics/Function : Black oxide for furniture, nickel for electronics.
Need a deep dive into a specific case (e.g., torque/pull-out test data)?
Core Competencies:
✅ Small CNC Machining – Producing miniature, complex parts (0.1mm–300mm) with tolerances down to ±0.005mm .
✅ Non-Standard Fasteners – Custom-designed screws, bolts, pins, and connectors for niche applications .
✅ Materials Expertise – Machining stainless steel, titanium, aluminum, plastics , and exotic alloys.
✅ End-to-End Solutions – From prototyping to high-volume production with strict ISO9001, IATF16949 compliance.
Key Industries Served:
Medical & Dental : Surgical tools, implantable devices, micro-fasteners.
Electronics : Micro-connectors, sensor housings, PCB mounts.
Aerospace & Defense : Lightweight brackets, drone components, specialty fasteners.
Automotive : Fuel injection parts, custom fasteners, EV components.
Why Choose Us?
✔ Precision-First Approach : Leveraging 3-axis 4-axis CNC, Swiss lathes, and EDM for intricate geometries.
✔ Agile Customization : Rapid turnaround for low-volume batches and one-off prototypes .
✔ Quality Assurance : Rigorous inspection (CMM, optical comparators) and traceability .
✔Global Supply Chain : Reliable logistics for JIT delivery and international clients.
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