Product
Product Details
C69300 Brass Parts, ECO Brass Machined Parts and Screw Machine Components
C69300 Brass Parts – ECO Brass Machined Parts & Screw Machine Components
C69300 ECO Brass (also designated UNS C69300, CDA 693, or Low-Lead Brass) is a high-performance, environmentally compliant copper-zinc alloy engineered specifically to replace high-lead brass grades in precision machined parts, screw machine components, and industrial fittings. Electrical Accessories India manufactures C69300 ECO Brass machined parts to tight dimensional tolerances for electrical OEMs, EPC contractors, power utilities, and global distributors. With lead content below 0.25%, these components fully comply with RoHS, REACH, NSF/ANSI 61, and California AB1953 potable water regulations, making them the preferred substitute wherever C36000 or CZ121 high-lead brass is being phased out.
Product Overview
Alloy Composition and Metallurgical Profile
C69300 is a silicon-bismuth modified alpha-beta brass containing approximately 76–79% copper, 20–22% zinc, 0.02–0.15% silicon, and trace amounts of bismuth and phosphorus, with lead restricted below 0.25%. This alloy formulation delivers a machinability index of approximately 80% relative to free-cutting C36000 brass, while maintaining tensile strength of 380–480 MPa and hardness of 80–95 HRB. The bismuth and silicon additions serve as internal lubricants during chip formation, enabling clean, controlled swarf break on CNC Swiss-type lathes, multi-spindle automatics, and single-spindle screw machines. Compared to standard CW614N or CuZn39Pb3, C69300 ECO Brass produces shorter, more manageable chips, reduces tool wear, and eliminates lead contamination in coolant streams, all critical factors in aerospace-standard and food-grade machining environments.
ECO Brass Machined Parts – Precision CNC and Screw Machine Components
Electrical Accessories India produces C69300 ECO Brass machined components on CNC turning centers, CNC Swiss lathes, rotary transfer machines, and conventional screw machines with bar stock diameters from 3 mm to 75 mm. Typical components include terminal blocks, connector bodies, cable gland bodies, compression fittings, valve stems, busbar connectors, insert nuts, threaded inserts, hexagonal standoffs, precision shafts, bushings, and sleeve bearings. Surface finishes achievable include bright machined, electroless nickel plated (ENP), tin plated, chrome plated, and passivated. Dimensional tolerances of ±0.01 mm on turned diameters are routinely achieved. Secondary operations including milling, cross-drilling, knurling, thread rolling, internal threading (M2 to M64), and broaching are performed in-house. All parts are dimensionally verified against 2D/3D CAD data using CMM (Coordinate Measuring Machines) and optical comparators.
Screw Machine Components – Automatic Lathe Turned Parts
Screw machine components produced from C69300 bar stock are designed for high-volume, repeat-tolerance applications where batch sizes range from 500 to 500,000 pieces. Our multi-spindle automatic lathes process C69300 rods at feed rates optimized for ECO Brass chip characteristics, delivering cycle times comparable to C36000 while eliminating lead-based cutting fluid additives. Components include electrical contact pins, switch parts, instrument fittings, hydraulic valve inserts, push-fit plumbing connectors, NPT-threaded adapters, BSP fittings, and precision blanks for further cold forming or stamping. Tool life monitoring systems on all screw machines ensure consistent part quality across long production runs. First article inspection (FAI) reports, process capability studies (Cpk ≥1.67), and material test reports (MTRs) are provided as standard documentation for OEM and EPC customers.
Electrical and Electronic Applications
In electrical OEM applications, C69300 ECO Brass is used for connector shells, cable gland bodies, EMC glands, terminal block components, busbar taps, grounding lugs, and instrument cluster fittings. The alloy's electrical conductivity of approximately 22–26% IACS is suitable for low-current signal components, while its corrosion resistance exceeds standard brasses in humid, salt-fog, and industrial atmospheres. UL-recognized and CE-marked assemblies incorporating C69300 parts meet IEC 60947-1 (low-voltage switchgear), IEC 61439 (switchgear assemblies), and IEC 60309 industrial plug and socket standards. For EPC contractor projects in power distribution substations, renewable energy installations, and industrial control panels, C69300 components offer a compliant, traceable, and RoHS-certified material supply chain.
Plumbing and Fluid Handling Components
C69300 ECO Brass is approved under NSF/ANSI 61 and NSF/ANSI 372 for potable water contact, making it directly applicable to drinking water fittings, water meter bodies, valve seats, thermostatic cartridge components, sprinkler heads, manifold blocks, push-fit connectors, and compression fittings for HVAC systems. Dezincification resistance of C69300, while not certified DZR (which applies to CW602N), is significantly superior to standard CuZn39Pb3 in chlorinated water supplies. Components for plumbing and gas applications are tested to EN 1254, ASTM B16, and applicable UPC/IPC codes. Wall thickness, thread pitch, and burst pressure ratings are confirmed by hydraulic pressure testing at 1.5× rated working pressure before dispatch.
Automotive, Instrumentation and Industrial OEM Parts
For automotive sub-assembly suppliers, instrumentation manufacturers, and general industrial OEMs, C69300 ECO Brass machined parts serve as precision inserts in polymer-encapsulated assemblies, sensor housings, actuator components, flow control valve bodies, pneumatic fittings, and hydraulic quick-disconnects. The alloy's thermal conductivity (approximately 109 W/m·K) and low magnetic permeability make it suitable for heat exchanger end caps, shielded connector housings, and proximity sensor bodies. PPAP documentation, IMDS (International Material Data System) submissions, and REACH SVHC declarations are available for automotive Tier-1 and Tier-2 suppliers. Custom part numbers, customer-specific packaging, and kanban supply agreements are supported.
Stamped and Cold-Formed ECO Brass Components
Beyond screw machining, C69300 strip and sheet is used for stamped contacts, terminal clips, spring washers, shielding brackets, EMI gaskets, and heat-formed fittings. Electrical Accessories India's progressive die stamping capability processes C69300 strip from 0.3 mm to 6 mm thickness, with strip widths up to 300 mm. Tolerances of ±0.05 mm on stamped profiles are standard. Finished stampings can be supplied in bright, tin plated (5–12 µm), nickel plated, or silver plated finish per IEC 60512 and automotive OEM specifications. Integration of stamped contacts and machined bodies into sub-assembled connector modules is available for OEM customers requiring turnkey supply.
Pricing
C69300 ECO Brass Machined Parts: US$ 11.50/kilogram (subject to order quantity, geometry complexity, and surface finish requirements. MOQ: 50 kg. Volume pricing available for annual contracts ≥500 kg.)
Key Features
- Lead content <0.25% – fully RoHS, REACH, NSF 61, and AB1953 compliant
- Machinability index ~80% of C36000, enabling high-volume automatic screw machining
- Tensile strength 380–480 MPa; hardness 80–95 HRB
- Excellent corrosion resistance in industrial atmospheres, chlorinated water, and salt fog
- Compatible with electroless nickel, tin, chrome, and silver plating systems
- Tight tolerances: ±0.01 mm on CNC turned diameters
- Full material traceability with MTRs, CoC, and REACH declarations
- Available in bar, rod, tube, and strip forms from certified mills
Lead-Free Compliance and Environmental Credentials
C69300 ECO Brass is specifically developed as the lead-free successor to C36000 (free-cutting brass) and CZ121 in markets subject to drinking water lead reduction legislation. It satisfies California Proposition 65, EU RoHS Directive 2011/65/EU (recast), REACH Regulation (EC) No 1907/2006, and NSF/ANSI 372 (lead content ≤0.25% weighted average) for potable water fittings. Our supply chain documentation includes mill certifications (EN 10204 3.1), REACH compliance declarations, and RoHS test reports from accredited third-party laboratories.
Dimensional Precision and Surface Quality
All C69300 machined parts are produced to customer-supplied drawings or international standards including DIN, BS, ASME, and JIS. Roundness, cylindricity, concentricity, and thread quality are verified using calibrated gauges, thread plug gauges, air gauges, and CMM. Surface roughness Ra 0.4–3.2 µm is achievable depending on machining operation and post-processing. Parts requiring tight bore concentricity for press-fit assembly are honed or ground to Ra 0.4 µm or better. Plating thickness uniformity is verified by XRF (X-ray fluorescence) on a sampling basis per AQL 2.5 (ISO 2859-1).
High-Volume Production Capabilities
Our multi-spindle automatic screw machines (Davenport, New Britain, and CNC multi-spindle configurations) process C69300 bar stock at sustained production rates. Changeover systems and pre-set tooling reduce setup time to under 2 hours for repeat jobs. Bar feeders and in-process gauging maintain Cpk ≥1.33 on critical dimensions. Production lots of up to 500,000 pieces per month per part number are achievable. Kitting, counting, and vacuum-sealed packaging with desiccant is available for long sea-freight shipments to export customers.
Custom Engineering Support
Our engineering team provides DFM (Design for Manufacturability) review for new C69300 part designs, identifying opportunities to reduce machining time, material waste, and finishing cost. Application engineering support covers material substitution analysis (C360 to C693 transition), tolerance stack-up review, plating system selection, and failure mode analysis for field returns. Customers receive dedicated account management, sample approval within 10–15 working days, and production lead times of 4–8 weeks depending on order volume.
Export and Global Supply
Electrical Accessories India exports C69300 ECO Brass machined parts to the USA, UK, Germany, Australia, UAE, Singapore, South Africa, and other markets. Export documentation includes commercial invoice, packing list, certificate of origin (CoO), test certificates (EN 10204 3.1), and REACH/RoHS declarations. HS code 7415.39 (brass screws, bolts, nuts, and fasteners) and 7419.80 (other articles of copper/brass) apply depending on part geometry. Air freight, sea freight (LCL/FCL), and express courier options are available.
Technical Specifications
| Property | Value / Range | Standard |
|---|---|---|
| UNS Designation | C69300 | ASTM / CDA |
| Common Name | ECO Brass / Low-Lead Brass / Silicon Brass | – |
| Copper (Cu) | 76–79% | ASTM B371 |
| Zinc (Zn) | Balance | ASTM B371 |
| Lead (Pb) | ≤0.25% | NSF 372 / AB1953 |
| Silicon (Si) | 0.02–0.15% | – |
| Bismuth (Bi) | Trace | – |
| Tensile Strength | 380–480 MPa | ASTM E8 |
| Yield Strength (0.2%) | 170–240 MPa | ASTM E8 |
| Elongation | 20–35% | ASTM E8 |
| Hardness | 80–95 HRB | ASTM E18 |
| Electrical Conductivity | 22–26% IACS | ASTM B193 |
| Thermal Conductivity | ~109 W/m·K | – |
| Machinability Index | ~80% (C360=100%) | CDA rating |
| Density | 8.47 g/cm³ | – |
| Melting Range | 895–935°C | – |
International Equivalent Grades
| Standard | Designation | Common Name |
|---|---|---|
| USA (UNS/ASTM) | C69300 / C693 | ECO Brass, Low-Lead Brass |
| Europe (EN) | CW724R (indicative) | Low-Lead Silicon Brass |
| Japan (JIS) | C6930 (indicative) | 低鉛黄銅 (Low-Lead Brass) |
| Germany (DIN) | CuZn21Si3P (indicative) | Silumin Brass |
| ISO | CuZn21Si3P | Silicon Brass |
| UK (BS) | CZ135 (indicative) | – |
| China (GB) | HSi80-3 (indicative) | 硅黄铜 |
Product Types and Variants
| Product Type | Description | Typical Sizes |
|---|---|---|
| CNC Turned Parts | Precision turned components on CNC lathes | Dia 3–75 mm |
| Screw Machine Parts | High-volume auto-lathe components | Dia 3–40 mm |
| Threaded Inserts | Heat-set and press-fit inserts for plastics | M3–M24 |
| Hex Standoffs | Hexagonal spacers, male/female/both ends | M3–M12, L 5–60 mm |
| Compression Fittings | Plumbing/HVAC compression end fittings | 6–54 mm OD tube |
| Cable Gland Bodies | ECO Brass gland bodies, NPT/PG/M threads | PG7–PG48, M16–M63 |
| Busbar Connectors | Electrical busbar taps and T-connectors | Custom |
| Stamped Contacts | ECO Brass stamped terminal contacts | Thickness 0.3–3 mm |
Applications by Industry
| Industry Sector | Typical C69300 Applications |
|---|---|
| Electrical OEM | Cable gland bodies, connector shells, terminal blocks, busbar taps, EMC fittings |
| EPC / Power Utilities | Substation fittings, MV/LV panel components, grounding connectors |
| Plumbing / HVAC | NSF-61 compression fittings, valve stems, manifold blocks, push-fit connectors |
| Automotive | Sensor housings, insert nuts, fluid connector bodies, actuator stems |
| Instrumentation | Flow meter bodies, pressure fitting adapters, thermowell connectors |
| Renewable Energy | Solar junction box fittings, wind turbine cable management, inverter connectors |
| Gas Distribution | Valve components, meter fittings, regulator bodies (NSF/AB1953 compliant) |
Manufacturing Process
Raw Material Sourcing: C69300 bar stock is sourced from approved mills certified to ASTM B371, EN 12163, or equivalent. Incoming material is verified by optical emission spectrometry (OES) for chemical composition before release to production.
CNC Machining: Parts are machined on CNC Swiss-type lathes (bar diameter up to 32 mm), CNC turning centers (up to 75 mm bar), and multi-spindle automatic screw machines. CAM programs are generated from customer 2D/3D drawings. First-off inspection is completed before production run commencement.
Secondary Operations: Milling, cross-drilling, knurling, thread rolling, broaching, and deburring are performed in-line or as separate operations. Threaded features are gauged with GO/NO-GO plug and ring gauges per ISO 1502.
Surface Treatment: Parts requiring plating (nickel, tin, chrome, silver) are processed by approved sub-contractors under controlled quality plans. Plating thickness and adhesion are verified per ASTM B571 and ISO 2819.
Inspection and Dispatch: Final inspection includes dimensional verification (CMM or manual), visual inspection, plating thickness (XRF), and packaging verification. Traceability records link each production lot to raw material certificates and process records.
Quality Standards and Certifications
| Standard / Certification | Applicability |
|---|---|
| ISO 9001:2015 | Quality Management System |
| RoHS 2011/65/EU | Lead <0.1% in electrical/electronic equipment |
| REACH SVHC | Substance of Very High Concern declaration |
| NSF/ANSI 61 & 372 | Potable water contact compliance |
| California AB1953 | Low-lead plumbing fittings for CA market |
| EN 10204 3.1 | Material test reports from mill |
| ASTM B371 | C69300 bar and rod specification |
| ISO 2859-1 | AQL sampling inspection plan |
Why Choose Electrical Accessories India
- Specialized ECO Brass expertise: Dedicated machining lines and tooling optimized for C69300 / ECO Brass swarf characteristics.
- Regulatory compliance: Full RoHS, REACH, NSF 61, AB1953 documentation package supplied as standard.
- Flexible capacity: Prototypes to 500,000 pieces/month; 4–8 week lead times on standard geometries.
- Global export: Experienced in export documentation, INCOTERMS (EXW, FOB, CIF), and customs classification (HS 7415/7419).
- Engineering support: DFM review, material substitution guidance (C360 to C693), and application engineering.
- Traceability: EN 10204 3.1 mill certs, lot traceability, and PPAP documentation for automotive customers.
Frequently Asked Questions (FAQ)
1. What is C69300 ECO Brass and how does it differ from C36000?
C69300 ECO Brass is a low-lead copper-zinc-silicon alloy with lead content ≤0.25%, engineered as a direct replacement for C36000 free-cutting brass (which contains 2.5–3.7% lead). Both alloys are machinable on automatic screw machines, but C69300 complies with RoHS, NSF 61, and AB1953 regulations that restrict lead in electrical components and potable water fittings.
2. Is C69300 approved for drinking water applications?
Yes. C69300 / ECO Brass complies with NSF/ANSI 61, NSF/ANSI 372 (weighted average lead ≤0.25%), and California AB1953 for use in potable water contact fittings, valves, and plumbing components.
3. What is the minimum order quantity (MOQ) for C69300 machined parts?
Our standard MOQ is 50 kg per part number. For prototype and sample requirements, smaller quantities can be discussed. Volume pricing is available for annual contract volumes above 500 kg.
4. What tolerances can be held on C69300 CNC turned parts?
Standard turned diameter tolerances are ±0.01–0.025 mm depending on diameter. Thread tolerances per ISO 286 tolerance grades 6g/6H are standard. Tighter tolerances (IT5 or better) are achievable on ground/honed features.
5. Can C69300 parts be electroless nickel plated (ENP)?
Yes. C69300 accepts electroless nickel plating (ENP), electrolytic nickel, tin, chrome, and silver plating after standard pre-treatment. ENP thickness of 5–25 µm is typical for wear and corrosion resistance applications.
6. What surface finishes are available on ECO Brass machined parts?
Available finishes include: as-machined (bright), degreased, passivated, tin plated (5–12 µm), nickel plated (5–25 µm), chrome plated (0.2–1 µm hard chrome), silver plated, and lacquered.
7. What documentation is provided with each shipment?
Standard documentation includes: commercial invoice, packing list, EN 10204 3.1 mill certificate, certificate of conformance (CoC), dimensional inspection report, RoHS/REACH declaration, and certificate of origin (CoO) for customs clearance.
8. What is the lead time for new C69300 part designs?
Sample/first article lead time is 10–15 working days from drawing approval. Production lead time is typically 4–8 weeks depending on quantity, complexity, and surface finish requirements.
9. Can Electrical Accessories India supply ECO Brass parts to international markets?
Yes. We export to USA, UK, Germany, Australia, UAE, Singapore, South Africa, Canada, and other markets. HS codes, export documentation, and INCOTERMS (EXW/FOB/CIF) are handled as part of the standard supply process.
10. Is C69300 ECO Brass compatible with standard CNC machining centers?
Yes. C69300 machines on standard CNC lathes, Swiss-type lathes, and automatic screw machines. Tool life may be approximately 10–15% shorter than with C36000 due to the absence of lead, but modern coated carbide tooling (TiAlN, TiCN) compensates effectively. Dry machining or minimum quantity lubrication (MQL) is preferred to avoid lead contamination of coolant.
Equivalent Terms in Major Languages
| Language | Term 1 | Term 2 | Term 3 |
|---|---|---|---|
| Spanish | Latón ECO sin plomo | Piezas de latón C69300 mecanizadas | Componentes de latón de bajo plomo |
| Russian | Экологическая латунь C69300 | Детали из латуни с низким содержанием свинца | Латунные точёные детали ECO |
| French | Laiton ECO sans plomb C69300 | Pièces usinées en laiton basse teneur en plomb | Composants laiton écologique |
| Portuguese | Latão ECO sem chumbo C69300 | Peças usinadas de latão de baixo chumbo | Componentes de latão ecológico |
| Italian | Ottone ECO senza piombo C69300 | Parti lavorate in ottone a basso piombo | Componenti torniti in ottone ecologico |
Related Products and Linked Terms
- Brass CNC Machined Parts
- Brass Screw Machine Parts
- Brass Turned Parts & Components
- CZ121 Brass Turned Parts
- CW614N Brass Components and Parts
- CuZn39Pb3 Brass Parts & Components
- Brass Hot Forged Parts
- Brass Forging Parts
- Copper Machined Parts
- Copper Milled Parts
- Stainless Steel 316 Turned Parts
Request a Quote – C69300 ECO Brass Machined Parts
Electrical Accessories India supplies C69300 ECO Brass machined parts, screw machine components, and stamped parts to OEMs, EPC contractors, distributors, and exporters worldwide. Indicative pricing: US$ 11.50/kilogram (quantity, geometry, and finish dependent). Contact our technical sales team with your drawings or specifications for a formal quotation.
📧 Email: info@elecaccs.com | 🌐 Website: www.elecaccs.com