Brass Hex Nuts – Brass DIN 934 Nuts | Manufacturer & Exporter from India
We are one of the leading manufacturers, suppliers and exporters of Brass Hex Nuts and Brass DIN 934 Nuts from India. We have been supplying Brass Hex Nuts and Brass fasteners to the world market for 3 decades. Our Brass hexagonal nuts are precision-manufactured to the tightest dimensional tolerances, making them ideal for critical electrical, industrial, plumbing, and construction applications. Crafted from free-cutting Brass alloys, these nuts offer outstanding corrosion resistance, excellent electrical conductivity, and a non-sparking, non-magnetic character that makes them preferred over mild steel in sensitive environments. From standard metric threads conforming to DIN 934 and ISO 4032 to custom imperial and special profiles, our manufacturing capability covers a wide size range and finish variety. We supply to OEMs, contractors, utilities, and distributors across Europe, North America, the Middle East, Southeast Asia, and Australia, backed by ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 certifications and three decades of global manufacturing experience.
Overview
Brass Hex Nuts — also known as Brass hexagonal nuts, Brass DIN 934 nuts, Brass full nuts, or Brass standard nuts — are one of the most fundamental fastening components in engineering. A hexagonal nut is an internally threaded fastener with six flat sides, designed to engage with a bolt, screw, or threaded stud to clamp two or more parts together. Brass is the preferred material when corrosion resistance, electrical conductivity, or aesthetics are critical, and where galvanic compatibility with Brass bolts or Copper busbars is required.
In electrical panel boards, switchgear assemblies, transformer terminations, and earthing systems, Brass Hex Nuts provide a secure and corrosion-resistant connection that Stainless Steel or mild steel nuts cannot always match without risk of galvanic corrosion or poor conductivity. In plumbing, Brass hex nuts seal threaded pipe joints reliably under pressure. In marine hardware, architectural fittings, and instrumentation, they offer the visual appeal of a bright or plated finish combined with lasting durability.
Our Brass Hex Nuts are manufactured in accordance with DIN 934, ISO 4032, BS 1768, IS 1363, ANSI/ASME B18.2.2, and JIS B 1181 standards, covering metric, BSW, BSF, UNC, UNF, and custom thread profiles. With a size range from M3 to M52 (and imperial equivalents from 4-40 UNC to 2″-UNC), we cater to small precision assemblies as well as large industrial equipment. Thread classes of 6H (metric) and 2B (unified) are standard, with 4H/6H and 3B available on request for fine-tolerance applications.
All material used is verified by spectrometer analysis and tensile testing, ensuring consistent chemical composition and mechanical properties batch to batch. Our facility operates CNC multi-spindle and Swiss-type lathes, automatic nut-forming presses, and thread rolling machines to deliver high-volume production with short lead times and minimal variation.
| Standard / Region | Grade / Designation | Composition | Remarks |
|---|---|---|---|
| India IS 319 | IS 319 Gr. 1 (Free-Cutting Brass) | Cu 57–59%, Pb 2.5–3.5%, Zn Bal. | Most common machining grade |
| India IS 291 | IS 291 / CZ121 | Cu 57–60%, Pb 1.5–2.5%, Zn Bal. | Good machinability & corrosion resistance |
| International / Europe | CW614N (CuZn39Pb3) | Cu 59%, Pb 3%, Zn Bal. | EN 12164 – ideal for automated CNC |
| Europe (Low Lead) | CW608N (CuZn36Pb2As) | Cu 63%, Pb 1.5–2%, As 0.02–0.15%, Zn Bal. | Dezincification-resistant (DR Brass) |
| USA – ASTM | C36000 (Free-Cutting Brass) | Cu 60–63%, Pb 2.5–3.7%, Zn Bal. | ASTM B16 – standard USA grade |
| USA – ASTM | C37700 (Forging Brass) | Cu 58–61%, Pb 1.5–2.5%, Zn Bal. | ASTM B124 – used for hot-forged nuts |
| UK – BS | CZ121 / CZ122 | Cu 57–59%, Pb 2.5–3.5%, Zn Bal. | BS 2874 – equivalent to IS 319 |
| Germany – DIN | CuZn39Pb3 / Ms 58 | Cu 57–60%, Pb 2.5–3.5%, Zn Bal. | DIN 17660 – widely specified in Europe |
| Japan – JIS | C3604 (Free-Cutting Brass) | Cu 59–63%, Pb 1.8–3.7%, Zn Bal. | JIS H 3250 – preferred in Japanese OEM supply |
| China GB | HPb59-1 / HPb59-3 | Cu 57–60%, Pb 1–3%, Zn Bal. | GB/T 4423 – Chinese equivalent |
| RoHS / REACH | Low-Lead Brass (< 0.25% Pb) | CW724R / C69300 | For potable water and eco-compliance |
Manufacturing Process
Brass Hex Nuts are produced by two primary routes: cold forming (cold forging or cold heading) for smaller sizes and machining from hexagonal Brass bar stock for larger or more complex geometries. In the cold forging process, coiled Brass wire is fed into a nut-former machine that progressively forms the blank, pierces the center hole, and extrudes the hex profile — all in a multi-station progressive die. The result is a net-shape blank that requires only thread tapping and deburring, making the process extremely cost-effective for high volumes in sizes M3 to M20.
For larger sizes (M20 to M52) or special profiles, hexagonal Brass bar is CNC-turned on multi-spindle automatic lathes. The bar is faced to length, the central bore is drilled and reamed to size, and the thread is cut with precision taps or thread-milling cutters. After tapping, nuts undergo deburring in vibratory finishing bowls, followed by ultrasonic cleaning, inspection, and plating if specified. Thread quality is verified using calibrated go/no-go gauges on a sampling plan conforming to ISO 2859-1 (AQL 1.0 or better).
Machines used in our facility include CNC multi-spindle automatic lathes, Sung-il and Davenport-type nut formers, Tajmac ZPS CNC turning centers, CNC thread-milling centers, vibratory deburring systems, thread-rolling machines for external threads, barrel plating lines (nickel, tin, chrome), and coordinate measuring machines (CMM) for dimensional verification.
International Standards Applicable
Our Brass Hex Nuts are manufactured and tested in accordance with the following international standards: DIN 934 (Hexagon Nuts — metric coarse pitch), ISO 4032 (Hexagon Nuts — Style 1), ISO 4033 (Hexagon Nuts — Style 2, heavy), BS 1768 (Unified Screw Threads — Hexagon Nuts), ANSI/ASME B18.2.2 (Square and Hex Nuts, inch series), JIS B 1181 (Hexagon Nuts), IS 1363 Part 3 (Hexagon Nuts and Thin Nuts for commercial quality), IS 2585 (Black Hexagon Bolts, Screws and Nuts), and RoHS 2011/65/EU (Restriction of Hazardous Substances) for applicable export markets.
| Thread (d) | Pitch (mm) | Width Across Flats s (mm) | Width Across Corners e (mm) | Nut Height m (mm) | Bearing Dia. da (mm) |
|---|---|---|---|---|---|
| M3 | 0.5 | 5.5 | 6.01 | 2.4 | 3.2 |
| M4 | 0.7 | 7.0 | 7.66 | 3.2 | 4.3 |
| M5 | 0.8 | 8.0 | 8.79 | 4.7 | 5.3 |
| M6 | 1.0 | 10.0 | 11.05 | 5.2 | 6.4 |
| M8 | 1.25 | 13.0 | 14.38 | 6.8 | 8.4 |
| M10 | 1.5 | 17.0 | 18.90 | 8.4 | 10.5 |
| M12 | 1.75 | 19.0 | 20.78 / 21.10 | 10.8 | 12.7 |
| M16 | 2.0 | 24.0 | 26.75 | 14.8 | 17.0 |
| M20 | 2.5 | 30.0 | 33.53 | 18.0 | 21.0 |
| M24 | 3.0 | 36.0 | 39.55 | 21.5 | 25.0 |
| M30 | 3.5 | 46.0 | 50.85 | 25.6 | 31.0 |
| M36 | 4.0 | 55.0 | 60.79 | 31.0 | 37.0 |
| Property | Value | Unit |
|---|---|---|
| Density | 8.47 – 8.50 | g/cm³ |
| Tensile Strength (annealed) | 340 – 400 | MPa |
| Yield Strength (0.2% offset) | 140 – 220 | MPa |
| Elongation at Break | 25 – 40 | % |
| Hardness | 55 – 90 | HRB |
| Thermal Conductivity | 109 – 120 | W/m·K |
| Electrical Conductivity | 26 – 28 | % IACS |
| Machinability Rating | 100 (reference material) | % vs C36000 |
| Melting Range | 900 – 940 | °C |
| Coefficient of Thermal Expansion | 20.5 | µm/m·°C |
Plating and Surface Finish Options
Brass Hex Nuts can be supplied in natural (self-colour) Brass finish or with various electroplated coatings to enhance corrosion resistance, conductivity, or appearance. Nickel plating (electroless or electrolytic) provides a bright, uniform coating with excellent corrosion and abrasion resistance, widely specified in automotive, marine, and electrical applications. Tin plating (electrolytic bright tin) improves solderability and prevents tarnish, making tin-plated Brass nuts preferred in PCB assembly, terminal blocks, and battery connectors. Chrome plating (decorative hexavalent or trivalent) is used where a mirror finish is required. Passivation with lacquer or a clear coat preserves the natural Brass colour for architectural and decorative applications. We can also supply hot-dip tinned and silver-plated variants for high-conductivity specialist applications in the transformer and switchgear sector.
Tolerances
Thread tolerances are maintained to 6H class (metric) and 2B class (unified) as standard, with 4H/6H available on request. Width-across-flats tolerance follows DIN 934 / ISO 4032 tolerances of -0.00 / +0.15 mm for flats up to 13 mm and -0.00 / +0.18 mm for larger flats. Height tolerances are ±0.1 mm on M3–M10 and ±0.15 mm on M12 and above. Custom tolerances and 100% inspection with CMM reports are available for critical aerospace or defence applications.
Industries Served
Our Brass Hex Nuts find application in electrical panel board assembly, switchgear and transformer manufacturing, plumbing and HVAC systems, marine and offshore hardware, automotive and two-wheeler assemblies, instrumentation and flow control, construction and architectural hardware, renewable energy installations (solar mounting systems and wind turbines), defence and aerospace sub-assemblies, and general-purpose industrial machinery. The non-magnetic and non-sparking nature of Brass makes these nuts mandatory in hazardous area equipment such as ATEX-rated enclosures and explosive-proof fittings.
Turnaround Time
Standard sizes in metric DIN 934 profile are maintained in stock for immediate dispatch or within 2–3 working days for repeat orders. For custom sizes, special threads, or large volume orders requiring dedicated production runs, our typical lead time is 4–6 weeks from order confirmation and approved drawings. We offer expedited production on mutual agreement for urgent requirements. Airfreight export to Europe, USA, and Australia can be arranged within 48–72 hours of dispatch.
Packaging and Shipping
Brass Hex Nuts are packed in polythene bags (inner) and corrugated fibreboard cartons (outer), with net weight per carton controlled to 20–25 kg for safe handling. Bulk packaging in plastic drums (for large orders) and customised retail blister/box packaging with customer branding or private labels are available on request. All packages are labelled with part number, material grade, thread specification, quantity, batch number, and our ISO certification details. We export via sea freight (FCL/LCL) and air freight to all major global ports, working with reputed freight forwarders for reliable on-time delivery.
Why Choose Us Over Other Manufacturers
With three decades of global manufacturing and export experience, we bring a level of application knowledge and quality consistency that newcomers cannot match. Our flexibility to manufacture fully custom Brass Hex Nuts — from non-standard thread pitches and flange profiles to special alloy grades and multi-layer platings — sets us apart from commodity fastener manufacturers. We maintain open communication with customers throughout the production cycle, providing dimensional inspection reports, material test certificates, and real-time production updates without prompting. Our customised packaging capability — including customer-branded labels, logo printing, and private-label options — makes us a preferred white-label manufacturing partner for distributors in the UK, Germany, USA, and Australia. Being ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 certified, we operate under a rigorous quality management system that ensures every batch is traceable back to raw material certificates. Our competitive pricing, driven by vertical integration (we control raw material procurement, machining, and plating in-house), combined with a 4–6 week standard lead time, makes us one of the most reliable Brass fastener exporters from India.
Customer Testimonials
“We have been sourcing Brass DIN 934 nuts from Cable Glands India for over four years now, and their consistency is remarkable. Every shipment arrives on time, dimensions are always within specification, and their team responds to queries within hours — not days. Truly a world-class supplier from India.”
— James Hartley, Procurement Manager, United Kingdom
“I was initially skeptical about sourcing fasteners from India, but Cable Glands India changed my perspective entirely. The quality of their Brass hex nuts matches what I used to buy from European suppliers at nearly double the cost. Their communication is excellent, and they even customised the packaging with our company branding. Highly recommended.”
— Michael Brennan, Operations Director, Australia
Frequently Asked Questions (Q&A)
Q1: What is a DIN 934 Brass Hex Nut?
DIN 934 is a German/European standard defining the dimensions and tolerances of hexagonal full nuts for metric coarse pitch threads. Brass DIN 934 nuts are manufactured from Brass alloy and conform to this dimensional standard, making them interchangeable with DIN 934 nuts from any compliant manufacturer globally.
Q2: What thread standards are available?
We supply Brass Hex Nuts in Metric (DIN 934 / ISO 4032), BSW (British Standard Whitworth), BSF (British Standard Fine), UNC (Unified National Coarse), UNF (Unified National Fine), NPT, and fully custom thread profiles as per customer drawings or samples.
Q3: What is the minimum order quantity (MOQ)?
For standard sizes our MOQ starts from 500 pieces. For custom sizes and special grades, MOQ varies from 1,000 to 5,000 pieces depending on the size and complexity. We are flexible for established customers and long-term partnerships.
Q4: Do you supply RoHS-compliant, low-lead Brass nuts?
Yes. We supply low-lead Brass nuts in CW724R (Europe, EN 12164) and C69300 (USA, ASTM) grades with lead content below 0.25%, suitable for potable water fittings and RoHS/REACH-compliant assemblies.
Q5: Can you manufacture non-standard sizes?
Absolutely. We regularly manufacture Brass Hex Nuts with non-standard across-flat dimensions, non-standard heights (extra thin or extra thick), left-hand threads, and custom chamfer angles. Please share your drawing or sample for quotation.
Q6: What plating options do you offer?
We offer nickel plating, tin plating, chrome plating, silver plating, gold plating, and lacquer or clear-coat finishes. Electroless nickel plating is available for uniform thickness on complex profiles.
Q7: What are Brass Jam Nuts (Thin Nuts)?
Jam nuts are extra-thin Brass hex nuts (approximately half the standard height) used as locking nuts in conjunction with a standard nut, or in applications where axial space is restricted. They conform to DIN 439 (ISO 4035) dimensional standards.
Q8: Are your Brass nuts suitable for use with Stainless Steel bolts?
Yes, Brass nuts can be used with Stainless Steel bolts, though care should be taken in highly saline or aggressive environments where galvanic corrosion could occur. In such cases, an appropriate grease or thread sealant is recommended. For electrical applications, Brass-on-Brass pairings are preferred for conductivity.
Q9: What quality control procedures do you follow?
All batches undergo incoming raw material verification (spectrometer analysis), in-process dimensional checks every 30 minutes on thread gauges and vernier calipers, and final inspection per ISO 2859-1 at AQL 1.0. Material test certificates (MTCs) are provided with each shipment on request.
Q10: Do you offer sample orders before full production?
Yes, we are happy to send pre-production samples for customer approval before committing to full-volume production. Sample charges may apply for custom sizes and are credited against the first full order.
Q11: What is your export experience?
We have been exporting Brass fasteners for over 30 years and regularly ship to the UK, Germany, USA, Canada, Australia, UAE, Saudi Arabia, South Africa, Singapore, and many other countries. We are familiar with all major export documentation requirements including Certificates of Origin, material test reports, and third-party inspection.
Q12: Can you put our company logo on the packaging?
Yes, we offer fully customised packaging — including branded polythene bags, cartons, and labels with your company logo, part numbers, and barcodes — at no significant additional cost for orders above a certain volume threshold.
Q13: What is the thread engagement length recommended for Brass Hex Nuts?
For Brass (softer than steel), the recommended minimum thread engagement length is 1.0 to 1.5 times the nominal bolt diameter. For critical structural applications, 1.5D is preferred to ensure full load bearing without thread stripping.
Q14: Are Brass Hex Nuts electrically conductive?
Yes. Brass is an excellent electrical conductor with approximately 26–28% IACS conductivity. Brass nuts are commonly used at busbar terminals, earthing points, and switchgear connections where good electrical contact is required.
Q15: What makes Brass Hex Nuts better than Zinc-plated Steel nuts in electrical applications?
Brass nuts are non-magnetic, non-sparking, and naturally corrosion-resistant without depending on the integrity of a plating layer. Zinc-plated steel nuts can lose their corrosion protection if the coating is scratched or chipped, and they are not suitable in ATEX or explosive environments due to spark risk. Brass remains the preferred choice in electrical, marine, and hazardous area applications globally.
Performance Metrics
Brass Hex Nuts manufactured from C36000 / CW614N Brass achieve a proof load stress of approximately 170 MPa at ambient temperature, which is sufficient for the majority of electrical and light-to-medium structural applications. For high-temperature applications (up to 150°C continuous), properties are retained within 90% of ambient values. Salt spray corrosion resistance in natural Brass exceeds 96 hours per ASTM B117; nickel-plated variants exceed 500 hours. Vibration resistance can be enhanced by combining Brass Hex Nuts with Brass spring washers or nylon-insert locking features where required by the application.
Glossary of Terms
Thread pitch – The axial distance between adjacent thread crests, expressed in mm for metric threads or threads-per-inch (TPI) for unified threads. Across flats (s) – The distance measured across two parallel flat faces of the hex nut, used for spanner or wrench sizing. Across corners (e) – The maximum diagonal dimension of the hex profile; always greater than across-flats. 6H thread class – ISO tolerance class for internal (nut) metric threads; indicates a medium fit with clearance for easy assembly. Go/No-Go gauge – A two-element thread gauge used to verify that threaded components are within tolerance; the “Go” gauge must pass, the “No-Go” must not. Free-cutting Brass – A Brass alloy with 1.5–4% lead added to improve chip breakage and machinability in automated CNC turning. DIN – Deutsches Institut für Normung; German standards organisation whose fastener standards (DIN 934, DIN 439, etc.) are widely adopted internationally. AQL (Acceptable Quality Level) – A sampling inspection standard; AQL 1.0 means up to 1% defective parts in a batch is the acceptance threshold. IACS – International Annealed Copper Standard; a measure of electrical conductivity relative to pure annealed copper (100% IACS). Dezincification resistance (DR) – A property of certain Brass alloys (containing arsenic or tin) that prevents selective leaching of zinc in water, resulting in a porous copper sponge; important for potable water fittings.
Related Parts
Brass hex bolts, Brass hex cap screws, Brass stud bolts, Brass lock nuts, Brass thin nuts (jam nuts), Brass flange nuts, Brass wing nuts, Brass coupling nuts, Brass castle nuts, Brass acorn nuts, Brass panel nuts, Brass plain washers, Brass spring washers, Brass threaded studs, Brass shim washers, Brass machine screws, Brass set screws, Brass eye bolts, Brass T-bolts, Brass anchor bolts
Meta Description: Brass Hex Nuts and DIN 934 Nuts manufacturer, supplier and exporter from India. Metric M3–M52, UNC, UNF, BSW threads in C36000, CW614N, IS 319 Brass. ISO 9001:2015 certified. Custom sizes, nickel/tin plating, 4–6 weeks delivery. 30 years export experience.
Request a Quote Today
Looking for a reliable manufacturer of Brass Hex Nuts and DIN 934 Nuts from India? We invite you to connect with our technical sales team for a competitive quotation, material data sheet, and dimensional confirmation. Whether you need a standard catalogue item, a modified profile, or a fully bespoke Brass fastener, we have the capability and the experience to deliver. Email: sales@cableglandsindia.com | Phone: +91-22-43449300. We typically respond to all enquiries within one business day. Our team is available across IST, GMT, and EST business hours to support customers globally.