Brass Expansion Inserts & Brass Expansion Dowels
Premium CZ121/CW614N Brass Threading Solutions | M4, M5, M6, M8 Sizes Available
Price: US$ 11.10/Kilogram
Premium Brass Expansion Inserts, Brass Expansion Anchors,Brass expansion fasteners,Brass Expansion Dowels Overview
PRICE: US$ 11/Kilogram
Our high-quality brass expansion inserts, also known as brass expansion dowels or brass expansion anchors, are precision-engineered threaded fastening solutions manufactured from premium CZ121/CW614N brass alloy. These spreading dowels provide exceptional tensile strength, superior corrosion resistance, and excellent electrical conductivity for demanding industrial and commercial applications.
Technical Specifications & Available Sizes
| Thread Size | Length (L) mm | Outside Diameter (ØD) mm | Pilot Hole Diameter | Material Grade |
|---|---|---|---|---|
| M4 | 8.0 | 5.3 | 5.0mm | CZ121/CW614N |
| M5 | 10.0 | 6.5 | 6.0mm | CZ121/CW614N |
| M6 | 12.0 | 8.0 | 7.5mm | CZ121/CW614N |
| M8 | 15.0 | 10.5 | 10.0mm | CZ121/CW614N |
Note: All dimensions are in millimeters. Pilot hole dimensions are for reference purposes only.
Brass Material Grades & Composition
CZ121 Brass (EN Standard)
CZ121 is a high-quality brass alloy conforming to European EN standards, offering excellent machinability and corrosion resistance. This lead-free brass composition ensures environmental compliance while maintaining superior mechanical properties.
CW614N Brass (European Designation)
CW614N represents the European designation for free-cutting brass with excellent cold working properties. This grade provides optimal balance between strength, ductility, and manufacturing efficiency.
Chemical Composition
Copper (Cu): 58-60%
Zinc (Zn): 39-41%
Lead (Pb): ≤0.2%
Iron (Fe): ≤0.3%
Mechanical Properties
Tensile Strength: 370-430 MPa
Yield Strength: 170-280 MPa
Elongation: 20-30%
Hardness: 80-120 HV
Physical Properties
Density: 8.5 g/cm³
Electrical Conductivity: 28% IACS
Thermal Conductivity: 120 W/m·K
Melting Point: 900-940°C
Functions & Applications
Primary Functions of Brass Expansion Inserts
Thread Creation
Creates permanent female threads in soft materials like wood, plastic, and composite materials without the need for tapping operations.
Load Distribution
Distributes fastening loads across a wider area, preventing material damage and ensuring secure connections.
Corrosion Protection
Brass material provides natural corrosion resistance in marine, outdoor, and chemical environments.
Electrical Conductivity
Maintains electrical continuity in electronic assemblies and grounding applications.
Industrial Applications
- Electronics & Electrical: PCB mounting, electrical enclosures, grounding applications
- Automotive: Interior trim, dashboard assemblies, electrical connections
- Marine Industry: Boat fittings, deck hardware, navigation equipment
- Furniture Manufacturing: Cabinet hardware, decorative fittings, structural connections
- HVAC Systems: Ductwork connections, equipment mounting, control panels
- Aerospace: Interior panels, avionics mounting, lightweight assemblies
- Medical Equipment: Device housings, mounting brackets, electrical connections
Related Technical Terms & Synonyms
Technical Categories
- Fastener Type: Expansion type threaded insert
- Installation Method: Press-fit, hammer-in, pneumatic insertion
- Material Classification: Non-ferrous metal fastener
- Thread Standard: ISO metric thread (M4, M5, M6, M8)
- Application Category: Permanent threaded connection
Installation Process & Technical Guidelines
Step-by-Step Installation
- Hole Preparation: Drill pilot hole to specified diameter with appropriate depth
- Insert Placement: Position brass expansion insert at hole entrance
- Press Installation: Apply steady downward pressure using press or hammer
- Expansion Activation: Insert expanding mechanism engages automatically
- Final Verification: Check thread engagement and holding strength
Quality Standards & Certifications
International Standards
ISO 9001:2015 Quality Management
EN 14399 Structural Fasteners
DIN 7991 Thread Standards
ASTM B16 Brass Specifications
Material Compliance
RoHS Compliant Materials
REACH Regulation Compliance
Lead-Free Brass Composition
Environmental Standards
Testing & Validation
Pull-out Strength Testing
Corrosion Resistance Testing
Dimensional Accuracy Verification
Material Composition Analysis
Get Your Brass Expansion Inserts Today
Contact us for competitive pricing, technical specifications, and stock availability on all M4, M5, M6, and M8 brass expansion inserts.
Why Choose Our Brass Expansion Inserts?
Frequently Asked Questions
What is the difference between CZ121 and CW614N brass?
Both CZ121 and CW614N refer to the same brass alloy composition under different standard systems. CZ121 is the EN (European) designation, while CW614N represents the European material number for the same free-cutting brass alloy.
Can these inserts be removed after installation?
Brass expansion inserts are designed for permanent installation. While removal is technically possible, it typically requires drilling out the insert, which may damage the surrounding material.
What pilot hole size should I use?
Pilot hole diameter should match the outside diameter of the insert before expansion. Refer to our specification table for exact dimensions for each thread size.
Are these inserts suitable for outdoor applications?
Yes, brass expansion inserts offer excellent corrosion resistance and are ideal for outdoor, marine, and humid environment applications due to brass’s natural anti-corrosive properties.
Get Your Custom Quote Today
Ready to enhance your assembly with premium Brass expansion inserts, Brass Expansion anchors, Brass Expansion Fasteners and Brass Dowels?
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Custom solutions available for unique applications and specifications
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