Brass Parts India is a premier manufacturer and exporter of Brass CZ121 Parts and Brass CZ121 Machined Parts from Jamnagar, India — serving OEM manufacturers, electrical equipment makers, plumbing and gas fitting suppliers, and precision component distributors across the USA and globally. CZ121 is the UK/European designation (BS EN 12164) for free-machining brass — equivalent to the widely used C36000 in North America — and is the premier alloy choice for high-speed CNC turning, Swiss screw machining, and automatic bar machining operations.
What is Brass CZ121?
CZ121 (also designated CW614N under EN) is a leaded free-machining brass containing approximately 58–60% copper, 39–41% zinc, and 2.5–3.5% lead. The lead acts as an internal lubricant during machining, producing short chips, reducing tool wear, and enabling very high cutting speeds — making it the global benchmark for brass screw machine and CNC turning work. CZ121 delivers an excellent combination of machinability, mechanical strength, corrosion resistance, and electrical conductivity, making it the go-to alloy for precision brass components across virtually every industry.
CZ121 Brass Parts Manufactured by Brass Parts India
CZ121 CNC Turned Parts and Screw Machine Components
High-volume CNC turned parts and automatic screw machine components in CZ121 brass — bushings, standoffs, inserts, ferrules, connectors, fittings, and custom rotational parts to very tight tolerances (±0.01 mm). Ideal for electrical connectors, pneumatic fittings, hydraulic components, and instrumentation parts.
CZ121 Brass Fittings and Plumbing Components
Precision-machined plumbing fittings in CZ121 including compression fittings, nipples, couplings, adapters, elbows, tees, and valves. Manufactured to ASTM, BS, DIN, and ASME standards for potable water, gas, HVAC, and industrial fluid systems.
CZ121 Brass Electrical Components
Terminal blocks, earth screws, cable gland bodies, plug pins, socket contacts, switchgear components, and bus bar connectors. CZ121’s excellent conductivity (approximately 26–28% IACS) and machinability make it the industry standard for electrical hardware.
CZ121 Brass Inserts and Threaded Inserts
Knurled, flanged, and press-fit threaded inserts for plastic moulding, PCB boards, and composite structures. Used extensively in electronics, automotive, and consumer appliance manufacturing.
CZ121 Precision Turned Parts for Pneumatics and Hydraulics
Valve bodies, orifice fittings, quick-connect couplers, hydraulic cartridges, and pneumatic manifold components machined from CZ121 bar stock. Excellent pressure ratings and leak-free performance for industrial automation applications.
CZ121 Brass Automotive and Fluid Power Components
Fuel system fittings, brake line adapters, radiator fittings, and sensor housings. CZ121’s resistance to dezincification (when specially treated) and corrosion makes it suitable for automotive under-hood environments.
CZ121 Custom Machined Parts to Drawing
Full capability to manufacture any CZ121 brass component from customer 2D drawings or 3D CAD files (STEP/IGES). Tolerances to IT6/IT7 grade achievable. Secondary operations: drilling, milling, knurling, thread cutting (metric and UNC/UNF), deburring, and plating.
CZ121 Material Grade and International Equivalents
| Standard | Designation | Country / Region | Cu % | Pb % | Zn % |
|---|---|---|---|---|---|
| BS EN 12164 | CZ121 / CW614N | UK / Europe | 57–59% | 2.5–3.5% | Balance |
| ASTM B16 / B453 | C36000 | USA | 60–63% | 2.5–3.7% | Balance |
| DIN 17660 | CuZn39Pb3 / 2.0401 | Germany | 57–59% | 2.5–3.5% | Balance |
| JIS H3250 | C3604 | Japan | 59–63% | 1.8–3.7% | Balance |
| ISO 426/1 | CuZn36Pb3 | International | 60–63% | 2.5–3.7% | Balance |
| GB/T 4423 | H59Pb3 | China | 57–60% | 2.5–3.5% | Balance |
| IS 319 | Grade I (Leaded Brass) | India | 60–63% | 2.5–3.5% | Balance |
Key Mechanical and Physical Properties of CZ121
| Property | Value |
|---|---|
| Tensile Strength | 380–450 N/mm² (drawn rod) |
| Yield Strength (0.2%) | 280–380 N/mm² |
| Elongation | 15–25% |
| Hardness | 75–110 HB |
| Machinability Rating | 100% (free-machining benchmark alloy) |
| Electrical Conductivity | ~26% IACS |
| Thermal Conductivity | ~120 W/m·K |
| Density | 8.5 g/cm³ |
Applications of CZ121 Brass Machined Parts
- Electrical terminals, connectors, and switchgear hardware
- Plumbing and gas fitting components (compression, push-fit, press-fit)
- Pneumatic and hydraulic fittings and valve bodies
- Automotive fuel and brake system fittings
- Electronic hardware: standoffs, spacers, inserts, pins
- Metering, instrumentation, and gauge fittings
- HVAC refrigerant fittings and valve stems
- Architectural and decorative hardware
- Medical device components and dental equipment fittings
Why Choose Brass Parts India for CZ121 Machined Parts?
- Jamnagar Location Advantage: Situated in India’s brass machining capital — access to the world’s best brass bar stock at the lowest cost.
- High-Speed CNC Capability: Multi-spindle CNC lathes and Swiss-type screw machines for very high volume at tight tolerances.
- Certified Material: CZ121/CW614N bar stock sourced from top Indian and international brass mills with full chemical analysis certificates.
- Secondary Operations In-House: Threading, milling, knurling, nickel/chrome/zinc plating, anodizing, and assembly.
- USA Compliance Documentation: RoHS, REACH, conflict minerals, material certificates, and dimensional reports.
- Competitive Pricing: Typical range USD 0.05–USD 8.00/piece depending on complexity, CIF US ports.
- ISO 9001 Certified Quality System with PPAP, FMEA, and control plan support for OEM customers.
Frequently Asked Questions – CZ121 Brass Parts
Q1: Is CZ121 the same as C36000 brass?
A: Essentially yes — both are free-machining leaded brasses with similar compositions and properties. CZ121 is the UK/BS designation, CW614N is the European EN designation, and C36000 is the US (ASTM/UNS) designation. Minor compositional differences exist but for most applications they are functionally interchangeable. We can supply to either designation per your purchase order requirement.
Q2: What tolerances can you achieve on CZ121 turned parts?
A: Standard production tolerances of ±0.05 mm are routine. Precision CNC turning can achieve ±0.01–0.02 mm on diameters. Threads: 6g/6H class as standard; 4g/5H for precision fits. We can work to your specific tolerance drawing.
Q3: Can you supply lead-free or low-lead alternatives to CZ121?
A: Yes. For applications requiring ROHS-compliant or NSF 61 potable water compliance (California AB1953 / NSF 372), we offer CW625N (CuZn38Pb1 – low lead), CW626N (CuZn35Pb1 – very low lead), and C69300 / C87850 silicon brass alternatives. Please specify your regulatory requirement when requesting a quote.
Q4: What surface finishes are available on CZ121 parts?
A: As-machined, bright polished, nickel-plated, chrome-plated, zinc-plated, tin-plated, gold-plated (selective), black oxide, and passivated. We handle most plating in-house or through our approved sub-contractors in Jamnagar.
Q5: What is your typical lead time for CZ121 machined parts?
A: Sample/prototype: 2–3 weeks. Production runs (standard): 4–6 weeks. High-volume repeat orders: 3–4 weeks with scheduled releases. Air freight available for urgent orders.
Request a Quote
Brass Parts India welcomes inquiries for CZ121/C36000 brass machined parts from US OEMs, distributors, and importers. Email your drawings or specifications to sales@brass-parts-india.com or call +91 22 4344 9300. We respond within 24 hours with a competitive CIF US port quotation.
