Lead Free Brass Machining, Lead Free Brass Screw Machine Parts
Lead Free Brass Machining, Lead Free Brass Screw Machine Parts
Lead Free Brass Machining & Lead Free Brass Screw Machine Parts — Precision CNC Turned Components for Electrical & Industrial Applications
Conex Metals manufactures lead free brass machining parts and lead free brass screw machine parts to meet RoHS, REACH, and NSF/ANSI 61 compliance requirements across electrical, plumbing, and industrial sectors. Our lead free brass CNC turned components, precision machined parts, and automatic screw machine parts are produced from certified low-lead and lead-free brass alloys including C36000-LF, C69300 (EnviroBrass III), C87850, and DZR brass, serving electrical OEMs, EPC contractors, power utilities, and global distributors. Price: US$ 13.90/Kg
Product Overview
Lead Free Brass Alloys & Material Compliance
Lead free brass machining parts are manufactured from copper-zinc alloys with lead content below 0.25% (w/w) to comply with global regulations including RoHS Directive 2011/65/EU, NSF/ANSI 61, California AB 1953, and Vermont Act 193. Standard alloy grades include C69300, C87850, C36000-LF (low-lead), CW511L, CW724R, and DZR (dezincification-resistant) brass. These alloys offer excellent machinability ratings (70–85% relative to free-cutting brass), corrosion resistance, and compatibility with potable water systems, electrical enclosures, switchgear components, and instrumentation fittings.
CNC Turned Brass Components & Automatic Screw Machine Parts
Conex Metals produces lead free brass screw machine parts on multi-spindle automatic screw machines (Davenport, New Britain, Acme-Gridley type) and Swiss-type CNC lathes. Parts include brass hex bolts, brass studs, brass inserts, threaded bushings, precision shafts, connector pins, terminal posts, standoffs, spacers, and custom machined components. Tolerances range from ±0.005 mm to ±0.025 mm depending on geometry and application requirements. Surface finishes available include natural mill, bright acid dip, nickel plating, tin plating, and chrome passivation.
Electrical & Switchgear Brass Parts
Lead free brass machined parts for electrical applications include earth bonding studs, grounding terminals, neutral link bars, cable gland bodies, conduit fittings, busbar connectors, armoured cable glands, MCB/MCCB terminals, transformer connectors, and earthing washers. These components are engineered for high electrical conductivity (minimum 26% IACS), dimensional precision, and mechanical strength to withstand torque loading in panel boards, junction boxes, switchgear assemblies, distribution boards, and metering installations. Alloys are selected for low contact resistance and compatibility with copper conductors.
Plumbing & Fluid System Brass Components
For potable water and plumbing applications, Conex Metals supplies NSF/ANSI 61 compliant lead free brass fittings, valve stems, ball valve bodies, compression fittings, manifold blocks, meter unions, check valve seats, coupling nuts, and push-fit connectors. DZR brass (CW602N, CZ132) parts are preferred for aggressive water conditions including chlorinated supplies, seawater, and acidic environments. These components comply with EN 12165, BS 6133, and ASTM B584 for pressure and temperature ratings applicable in HVAC systems, gas distribution, and water treatment plants.
Instrumentation & Precision Brass Parts
Precision lead free brass turned parts for instrumentation include pressure gauge adaptors, thermowell fittings, flow meter connections, pneumatic tube fittings, hydraulic connectors, orifice plates, regulator bodies, solenoid valve components, sensor housings, and instrument manifolds. These components require tight surface finish (Ra 0.8–1.6 µm), concentricity within 0.005 mm TIR, and thread form accuracy to 6H/6g tolerance class. Conex Metals machines to BS 21, NPT, BSPT, G (ISO 228), and metric thread standards for global compatibility.
Custom Forged & Milled Brass Parts
Beyond screw machine production, Conex Metals offers custom lead free brass forged components including brass forgings for valve bodies, flanged bushings, gear blanks, impeller hubs, and hydraulic block bodies. Hot forging improves grain structure, eliminating porosity and increasing tensile strength by 15–20% compared to cast equivalents. Post-forging CNC milling, drilling, reaming, and tapping produce finished components with flatness tolerances of 0.01 mm/100 mm, parallelism within 0.02 mm, and perpendicularity to IT7 grade.
Fasteners, Inserts & Threaded Parts
Lead free brass fasteners produced by Conex Metals include machine screws, hex head bolts, socket cap screws, grub screws, wing nuts, square nuts, knurled thumb screws, rivet nuts, heat-set inserts, press-fit inserts, and helical threaded inserts. Thread standards include ISO metric (M2–M64), UNC, UNF, BSW, BSF, Whitworth, and trapezoidal (TR) profiles. Thread rolling is available for enhanced fatigue life. Brass inserts are supplied for thermoplastic, thermoset, and composite material assemblies, meeting DIN 16903 and BS 3643 dimensional standards.
Connector Pins, Terminals & Electrical Contacts
Conex Metals manufactures lead free brass connector pins, socket contacts, terminal blades, fork terminals, ring terminals, butt splice connectors, push-in wire connectors, crimp terminals, DIN rail terminal blocks, and PCB mounting pins. Tin-plated, nickel-plated, and silver-plated finishes are available to reduce contact resistance, prevent galvanic corrosion, and meet UL 486A-486B, IEC 60947-7-1, and VDE 0611 standards. Pin diameters range from 0.5 mm to 25 mm with custom contact geometry available.
Key Features
- RoHS, REACH, NSF/ANSI 61, California AB 1953 compliant lead free alloys
- CNC turning tolerances: ±0.005 mm to ±0.025 mm
- Surface finishes: natural, tin, nickel, chrome, silver, zinc plating
- Full thread form capability: ISO, UNC, UNF, BSW, BSP, NPT, BSPT
- Multi-spindle screw machine and Swiss CNC production capability
- Lot traceability with material test certificates (MTCs) per EN 10204 3.1
- Second-operation machining, heat treatment, and press fitting available
- Export packing for sea freight, air freight, and courier delivery globally
Alloy Machinability & Corrosion Resistance
Lead free brass alloys such as C69300 (EnviroBrass III) and C87850 (Eco Brass) demonstrate machinability ratings of 70–85% relative to C36000 free-cutting brass (rated at 100%). Silicon brass alloys (C87850) offer chip-breaking characteristics comparable to leaded grades without bismuth additions. DZR brass alloys exhibit dezincification resistance test (DR test per ISO 6509) pass results, making them suitable for brackish water, seawater, and heated supply systems where standard brass would fail through selective leach corrosion.
Dimensional Accuracy & Geometric Tolerances
Conex Metals maintains dimensional accuracy per ISO 286-1 tolerance grades IT5 through IT9 depending on feature type and production method. Roundness, cylindricity, and surface profile tolerances are held to 0.003–0.010 mm for precision turned diameters. Thread pitch diameter accuracy is verified to 6H (internal) and 6g (external) tolerance classes using calibrated plug and ring gauges traceable to NABL-accredited standards. First Article Inspection (FAI) reports, PPAP Level 3 documentation, and dimensional inspection reports are available on request.
Surface Finish & Plating Options
Post-machining surface treatment options include bright acid dip (natural brass), electroless nickel plating (5–25 µm), electrolytic tin plating (3–15 µm), zinc plating with chromate passivation, silver plating for electrical contacts (2–10 µm), and anodizing for aluminium co-assemblies. Plating specifications comply with ASTM B545 (tin), ASTM B689 (nickel), AMS 2406 (silver), and ISO 4520 (zinc chromate). RoHS-compliant trivalent chromate passivation is used exclusively — hexavalent chrome passivation is not applied.
Thread Standards & Fastener Compatibility
All threaded lead free brass parts are produced to recognised international thread standards: ISO 68-1 metric coarse and fine, ASME B1.1 UNC/UNF, ASME B1.20.1 NPT, BS EN ISO 228-1 G (parallel), BS 21 BSPT (tapered), DIN 13 (metric), and BS 84 (British Standard Whitworth). Thread gauging is performed on every batch using GO/NO-GO gauges calibrated against master gauges. Customers may specify custom thread forms including ACME, trapezoidal, Buttress, and square thread profiles for specialised valve and actuator applications.
Packaging, Marking & Traceability
Lead free brass screw machine parts are supplied in polybag-lined fibre cartons, wooden pallets, or custom packaging per buyer specification. Each batch is tagged with part number, material grade, heat/lot number, quantity, net weight, gross weight, country of origin (India), and customer purchase order reference. Mill test certificates (EN 10204 3.1) covering chemical composition (OES/spectrometric analysis), mechanical properties (hardness, tensile, yield), and dimensional inspection data accompany every shipment. ROHS conformity certificates and third-party inspection (SGS, Bureau Veritas) are available on request.
Delivery Formats & MOQ
Conex Metals supplies lead free brass machined parts in standard and custom configurations. Minimum order quantities (MOQ) depend on part complexity: screw machine parts typically require 500–5,000 pieces per part number for economical production, while CNC turned custom parts may run from 50 pieces. Delivery lead times range from 3–5 weeks for standard parts to 8–12 weeks for complex custom parts requiring special tooling. Parts are supplied individually inspected or per AQL 2.5 sampling plans per ISO 2859-1. Competitive pricing starting at US$ 13.90/Kg.
Technical Specifications
Lead Free Brass Alloy Grades & Properties
| Property | C69300 (EnviroBrass III) | C87850 (Eco Brass / SeBiLOY) | C36000-LF (Low Lead) | DZR Brass (CW602N) |
|---|---|---|---|---|
| Cu (%) | 75.5–77.5 | 57.0–59.0 | 60.0–63.0 | 61.0–63.0 |
| Zn (%) | Balance | Balance | Balance | Balance |
| Pb (%) | ≤0.09 | ≤0.09 | ≤0.25 | ≤0.20 |
| Si (%) | 2.7–3.4 | 0.6–1.2 | — | — |
| As (%) | — | — | — | 0.02–0.06 |
| Tensile Strength (MPa) | 345–485 | 345–415 | 340–470 | 360–480 |
| Yield Strength (MPa) | 170–275 | 140–200 | 125–205 | 150–250 |
| Hardness (HRB) | 55–80 | 50–75 | 55–80 | 58–82 |
| Machinability (%) | 80 | 70 | 85 | 70 |
| Electrical Conductivity (%IACS) | 24–27 | 24–26 | 26–28 | 26–28 |
| DZR Resistance | Good | Moderate | Moderate | Excellent |
International Material Equivalents
| UNS (USA) | EN (Europe) | BS (UK) | IS (India) | DIN (Germany) | JIS (Japan) | ASTM |
|---|---|---|---|---|---|---|
| C69300 | CW511L | CZ133 | — | — | — | B371 |
| C87850 | — | — | — | — | — | B584 |
| C36000-LF | CW508L | CZ121 | HBrass | CuZn36Pb3 | C3600 | B16 |
| C28000 (DZR) | CW602N | CZ132 | — | CuZn40Pb2 | — | B111 |
| C46400 | CW712R | CZ114 | — | CuZn38Sn1 | C4640 | B21 |
Machining Tolerances & Surface Finish Capabilities
| Parameter | CNC Swiss Turning | Multi-Spindle Screw Machine | CNC Milling | Hot Forging + CNC |
|---|---|---|---|---|
| Diameter Tolerance | ±0.005 mm | ±0.010 mm | ±0.010 mm | ±0.025 mm |
| Length Tolerance | ±0.010 mm | ±0.020 mm | ±0.015 mm | ±0.050 mm |
| Concentricity (TIR) | 0.005 mm | 0.010 mm | N/A | N/A |
| Surface Finish (Ra) | 0.4–1.6 µm | 0.8–3.2 µm | 0.8–3.2 µm | 1.6–6.3 µm |
| Thread Tolerance | 6H/6g | 6H/6g | 6H/6g | 6H/6g |
| Part Length Range | 1–350 mm | 5–150 mm | Custom | Custom |
| Part Diameter Range | 1–38 mm | 3–65 mm | Custom | Custom |
Product Types & Variants
| Product Type | Material Grade | Size Range | Key Application | Price (US$/Kg) |
|---|---|---|---|---|
| Hex Turned Parts (Bolts, Nuts, Studs) | C69300 / C36000-LF | M3–M48 / 1/4″–2″ | Electrical panels, bus bars | 13.90 |
| Cylindrical Turned Parts | C87850 / C69300 | Ø1–65 mm | Connectors, valve stems | 13.90 |
| Threaded Inserts & Bushings | C36000-LF / C46400 | M2–M24 | PCB, thermoplastic assemblies | 13.90 |
| Cable Gland Bodies & Locknuts | C69300 / DZR Brass | M16–M75 / PG7–PG48 | Armoured cable terminations | 13.90 |
| Terminal Pins & Connector Parts | C87850 / C36000-LF | Ø0.5–25 mm | Switchgear, terminals | 13.90 |
| Valve Bodies & Plumbing Fittings | DZR Brass / C69300 | DN8–DN100 | Potable water, HVAC, gas | 13.90 |
| Instrumentation Fittings | C69300 / C87850 | 1/8″–1″ BSP/NPT | Pressure gauges, flow meters | 13.90 |
| Custom Forged Brass Parts | CW724R / C46400 | Per drawing | Valve bodies, gear blanks | 13.90 |
Applications by Industry
| Industry Sector | Typical Parts / Components | Key Standards |
|---|---|---|
| Electrical & Switchgear | Earthing studs, neutral links, bus bar connectors, MCB/MCCB terminals, cable glands, terminal blocks, junction box fittings | IEC 61439, IEC 60947, BS 951 |
| Power Generation & Utilities | Transformer tap connectors, generator terminal posts, earthing clamps, current transformer fittings, metering components | IEC 60076, IEEE C57 |
| Plumbing & Water Treatment | Ball valve stems, compression fittings, manifold blocks, meter unions, push-fit bodies, gate valve parts | NSF/ANSI 61, BS EN 1254 |
| HVAC & Refrigeration | Service valve stems, Schrader valve cores, flare fittings, compression adapters, solenoid valve bodies | EN 12284, ASHRAE 15 |
| Oil & Gas / EPC | Instrument tube fittings, valve packing nuts, tubing adapters, gauge adapters, manifold blocks | ASME B31.3, NACE MR0175 |
| Telecommunications | Coaxial connector bodies, RF connector shells, grounding lugs, equipment mounting hardware | IEC 61169, MIL-C-39012 |
| Automotive & EV | Connector terminals, EV charging inlet parts, battery terminal posts, cable terminations | ISO 15118, SAE J1772 |
| Instrumentation & Metering | Pressure gauge sockets, thermowell shanks, flow meter connections, pneumatic fittings | ASME B40.100, EN 837 |
Manufacturing Process
Step-by-Step Production Flow
| Stage | Process | Equipment / Method | Quality Check |
|---|---|---|---|
| 1. Material Procurement | Certified lead free brass bar, rod, forging billets | ISO/IEC 17025 lab tested | OES spectrometric analysis |
| 2. Incoming Inspection | Chemical & dimensional verification | OES spectrometer, CMM | EN 10204 3.1 MTC review |
| 3. CNC Machining / Screw Machining | Turning, milling, drilling, threading | Swiss CNC, multi-spindle, CNC mill | SPC, first-piece approval |
| 4. Forging (if applicable) | Hot closed-die forging at 650–750°C | Hydraulic / mechanical press | Visual, dimensional, die check |
| 5. Secondary Operations | Deburring, knurling, reaming, broaching | Vibro deburring, CNC lathe | Surface roughness check |
| 6. Surface Treatment | Plating, passivation, acid bright dip | Barrel / rack plating lines | Plating thickness (XRF) |
| 7. Final Inspection | 100% or AQL 2.5 per ISO 2859-1 | CMM, optical comparator, thread gauges | Full dimensional report |
| 8. Packing & Despatch | Polybag + carton / pallet packing | Per customer specification | Label, MTC, packing list |
Quality Standards & Certifications
- ISO 9001:2015 — Quality Management System certified
- RoHS 2011/65/EU & 2015/863/EU — Restriction of hazardous substances compliance
- REACH SVHC — Substances of very high concern declaration
- NSF/ANSI 61 — Drinking water system components (applicable grades)
- EN 10204 3.1 — Material Test Certificates with spectrometric analysis
- ISO 286-1 — Dimensional tolerances and fits
- ISO 1302 — Surface roughness specification
- ISO 2859-1 — Sampling procedures for inspection by attributes (AQL 2.5)
- ASTM B16 / B371 / B584 — Relevant ASTM brass material standards
- Third-party inspection — SGS, Bureau Veritas, TUV available on request
Why Choose Conex Metals
| Capability | Details |
|---|---|
| Regulatory Compliance | All lead free brass parts supplied with RoHS, REACH, and NSF/ANSI 61 declarations; no additional certification cost |
| Multi-Process Capability | CNC turning, Swiss-type turning, multi-spindle screw machining, CNC milling, hot forging under one roof |
| Material Expertise | 15+ years experience in lead free brass alloy machining; deep knowledge of C69300, C87850, CW602N, and DZR grades |
| Global Export Experience | Regular supply to USA, UK, EU, Middle East, Australia, and Southeast Asia; experienced in INCOTERMS 2020 and LC/DP/TT payment terms |
| Traceability | Full heat/lot traceability from raw material to finished part; EN 10204 3.1 MTCs with every shipment |
| Flexible MOQ | Prototype quantities from 50 pieces; volume production up to 5 million pieces per month |
| Technical Support | Engineering team available for DFM (design for manufacturability) review, material selection guidance, and drawing review |
| Competitive Pricing | Price from US$ 13.90/Kg; volume discounts available for annual contracts and blanket orders |
Frequently Asked Questions (FAQ)
1. What is lead free brass and how does it differ from standard brass?
Lead free brass is a copper-zinc alloy with lead content restricted to 0.25% or less by weight. Standard free-cutting brass (C36000) contains 2.5–3.7% lead as a machinability aid. Lead free variants use silicon, bismuth, selenium, or antimony as alternative additives to maintain machinability while meeting regulatory requirements under RoHS, NSF/ANSI 61, and California AB 1953 (the “no-lead” law for plumbing products).
2. Which lead free brass alloy does Conex Metals recommend for electrical applications?
For electrical applications requiring high conductivity and RoHS compliance, Conex Metals recommends C69300 (EnviroBrass III) or C36000-LF. C69300 provides good machinability (80% rating), adequate conductivity (~26% IACS), and full lead free compliance. For connector pins and electrical contacts requiring optimal conductivity, C87850 (Eco Brass) is an effective alternative with silicon-enhanced machinability.
3. What is the lead content in your lead free brass parts?
All lead free brass parts supplied by Conex Metals conform to a maximum lead content of 0.25% (w/w) or lower, depending on the alloy selected. C69300 and C87850 are typically <0.09% Pb, meeting the most stringent requirements including California AB 1953 and Vermont Act 193 which require ≤0.25% weighted average lead content in wetted surfaces.
4. Are your lead free brass machined parts RoHS compliant?
Yes. All lead free brass parts manufactured by Conex Metals are compliant with RoHS Directive 2011/65/EU as amended by 2015/863/EU. We provide RoHS conformity declarations and REACH SVHC non-presence declarations with each shipment. Third-party RoHS test reports from accredited laboratories are available for specific part numbers at additional cost.
5. What is the minimum order quantity (MOQ) for lead free brass screw machine parts?
MOQ for standard screw machine parts is 500 pieces per part number. For CNC Swiss-turned custom parts, MOQ starts at 50 pieces. Prototype and sample orders are accepted without minimum quantity constraints for new customer qualification purposes, subject to NRE (non-recurring engineering) tooling charges where custom tooling is required.
6. What surface treatments are available for lead free brass machined parts?
Conex Metals offers the following surface treatments: natural bright acid dip, electroless nickel plating (5–25 µm), electrolytic tin plating (3–15 µm), trivalent zinc chromate passivation, silver plating (2–10 µm for electrical contacts), and copper strike undercoat. All plating processes are RoHS compliant; hexavalent chrome and PBB/PBDE-based processes are not used. Plating thickness verification is performed using XRF (X-ray fluorescence) gauges.
7. Can Conex Metals supply material test certificates (MTCs) for lead free brass parts?
Yes. EN 10204 3.1 material test certificates covering chemical composition (OES spectrometric), mechanical properties (hardness, tensile strength), and dimensional inspection data are provided with every production batch at no additional charge. 3.2 certificates (countersigned by third-party inspectors such as SGS or Bureau Veritas) are available on request.
8. What thread standards can Conex Metals produce on lead free brass parts?
Conex Metals machines all major international thread standards including: ISO metric (M1.6 to M64), UNC and UNF (ASME B1.1), NPT and NPTF (ASME B1.20.1), BSP parallel G (ISO 228-1), BSPT tapered (BS 21), British Standard Whitworth (BSW), British Standard Fine (BSF), and trapezoidal TR threads. Custom thread profiles including Acme, Buttress, and square threads are also machined to customer drawings.
9. Do you supply DZR (dezincification resistant) brass parts?
Yes. Conex Metals supplies DZR brass machined parts in alloy grades CW602N (EN), CZ132 (BS), and C28000 (UNS) for applications involving aggressive water, chlorinated supplies, seawater, and soil burial conditions. DZR brass parts pass the dezincification resistance test per ISO 6509 and are approved for use under BS EN 12288, DVGW W534, and similar water fitting regulations in EU markets.
10. What are the export markets for Conex Metals lead free brass machined parts?
Conex Metals exports lead free brass machined components to USA, United Kingdom, Germany, France, Italy, Netherlands, UAE, Saudi Arabia, Qatar, Australia, Singapore, and other markets across Asia-Pacific, Middle East, and Europe. We comply with export documentation requirements including commercial invoices, packing lists, certificates of origin (COO), test certificates, and REACH/RoHS declarations required by importing country customs and regulatory bodies.
Equivalent Terms in International Languages
| Language | Term 1 | Term 2 | Term 3 |
|---|---|---|---|
| Spanish | Latón sin plomo mecanizado | Piezas de tornillería de latón sin plomo | Mecanizado CNC de latón sin plomo |
| Russian | Латунь без свинца обработанная | Детали из латуни без свинца | Станочная обработка латуни без свинца |
| French | Laiton sans plomb usiné | Pièces décolletées en laiton sans plomb | Usinage CNC laiton sans plomb |
| Portuguese | Latão sem chumbo usinado | Peças torneadas de latão sem chumbo | Usinagem CNC de latão isento de chumbo |
| Italian | Ottone senza piombo lavorato | Parti tornite in ottone senza piombo | Lavorazione CNC ottone senza piombo |
Related & Linked Parts / Terms
- Brass Earthing Parts & Electrical Earthing Components
- Brass Cable Glands & Cable Gland Fittings
- Brass Forged Parts & Brass Forgings
- Brass Turned Parts & Precision CNC Turned Components
- General Turned, Milled & Forged Parts Category
- Related Terms: lead free brass bar, eco brass machining, silicon brass parts, RoHS brass components, NSF 61 brass fittings, dezincification resistant brass, C69300 machined parts, C87850 parts, brass screw machine parts, brass CNC turned components, low lead brass fasteners, brass terminal connectors, brass earthing hardware, DZR brass fittings, lead free plumbing brass
Request a Quote — Lead Free Brass Machined Parts
Conex Metals supplies lead free brass machining parts and lead free brass screw machine parts to buyers across electrical, utility, EPC, HVAC, instrumentation, and plumbing industries globally. Our engineering team provides prompt quotations within 24 hours of drawing or specification receipt.
Price: US$ 13.90/Kg (indicative; final price subject to alloy grade, part geometry, quantity, and surface treatment)
- Submit your drawing or specification to receive a firm quotation
- Samples available for new part qualification
- Bulk order and annual blanket order pricing available
- Export documentation and third-party inspection arranged on request
Contact Conex Metals → | Email: sales@conexmetals.com | Enquire Now for Volume Pricing
