Brass DIN 934 Hex Nuts

Brass DIN 934 Hex Nuts

Electrical Accessories India manufactures brass DIN 934 hexagon nuts to DIN 934 / ISO 4032 standard from free-cutting brass CW614N (CZ121 / IS 319 Type I) for the full size range M1.6 to M36. Brass hex nuts are one of the most widely used fasteners in the electrical industry: from miniature M1.6 nuts in precision relay assemblies to M36 nuts in high-voltage transformer terminal connections. The combination of corrosion resistance, non-magnetic properties, moderate electrical conductivity, and compatibility with brass hardware throughout the electrical assembly makes brass DIN 934 nuts the default fastener nut for electrical OEMs, panel builders, switchgear manufacturers, cable gland suppliers, and instrumentation equipment producers globally.

Product Overview

DIN 934 / ISO 4032 Standard and Dimensional Compliance

DIN 934 (now technically superseded by ISO 4032 but still commercially referenced universally) specifies hex nuts in metric ISO thread with standard height (approximately 0.8 × nominal diameter). AF dimensions, nut height, chamfer angle (30°), and thread tolerance (6H) conform exactly to the standard for full interchangeability. Brass DIN 934 nuts are dimensionally interchangeable with steel ISO 4032 hex nuts of the same size, making them a direct drop-in material substitute in designs originally specified with steel nuts where corrosion, non-magnetic requirements, or galvanic compatibility dictates the use of brass.

Free-Cutting Brass Alloy – CW614N / CZ121 / IS 319

The standard alloy for brass hex nut manufacture is CW614N (European designation), CZ121 (British designation), or IS 319 Type I (Indian designation), all referring to free-cutting brass with approximately 57–59% Cu, 2.5–3.5% Pb, balance Zn. The lead content provides the free-machining characteristic that allows high-speed automatic nut production with excellent surface finish and dimensional accuracy. Lead-free brass alternatives (CW617N for DZR brass, IS 319 Type II for unleaded brass) are available for RoHS-compliant applications—important for European electrical equipment exports where restrictions on lead content in mechanical components are tightening under various industry programmes.

Size Range – M1.6 to M36

The complete metric size range M1.6 through M36 in DIN 934 profile covers virtually every nut size required in electrical manufacturing. M1.6–M3 (miniature): used in precision instruments, relay assemblies, meter housings, and small PCB-related hardware. M4–M12 (most common): panel assembly, terminal block hardware, cable gland locknuts, switchgear component mounting. M12–M24 (medium): transformer terminal connections, motor terminal box hardware, switchgear bus connections, cable lug assembly. M24–M36 (large): high-voltage equipment bushings, large transformer LV/HV terminal hardware, substation bus connections. All sizes are maintained in inventory for prompt dispatch.

Thread Forms Available – Metric Coarse, Fine, UNC, UNF, BA

While DIN 934 specifies metric coarse thread (ISO Metric Coarse, standard pitch per ISO 261), brass hex nuts are also produced in metric fine (MF) thread for applications requiring reduced thread pitch for vibration resistance or fine adjustment: M8×1.0, M10×1.25, M12×1.5, M16×1.5, M20×1.5. UNC and UNF thread brass hex nuts are manufactured for North American standard electrical equipment. BA (British Association) thread brass nuts (0BA–10BA) for UK legacy electrical equipment maintenance are available in the standard DIN 934 profile height. Custom thread forms on request.

Applications Across the Electrical Value Chain

Brass DIN 934 hex nuts are used throughout the electrical manufacturing value chain: cable gland locknuts and panel mounting nuts (PG and metric threads), terminal block clamping nuts in DIN rail-mounted terminal strips, relay and contactor housing nuts, current and voltage transformer secondary terminal nuts, switchgear isolator jaw mounting nuts, transformer core clamping hardware, LV/HV winding termination hardware, motor terminal box fasteners, panel-mounted selector switch and pushbutton mounting hardware, instrument panel earth stud nuts, and battery terminal post nuts. The breadth of application ensures that brass DIN 934 hex nuts are among the highest-volume fasteners purchased by electrical equipment manufacturers.

Surface Finishes for Electrical Brass Nuts

Standard supply condition: bright bare brass (natural finish). Electroplated surface treatments available: nickel plating (3–15 µm, improved corrosion and wear resistance), tin plating (3–10 µm, improved solderability, used in PCB and harness assembly), chrome plating (decorative, outdoor panel hardware), zinc plating + chromate passivation (economical, for general indoor applications), and gold plating (0.5–2 µm on nickel undercoat, for precision measurement and aerospace applications). Passivation (chemical brightening) of as-machined brass nuts improves surface appearance and removes machining oils.

Property Class and Mechanical Strength

Brass DIN 934 hex nuts are classified as property class 04 (brass, non-hardened) per ISO 898-2 equivalent for non-ferrous. Proof load stress: 310–380 MPa; minimum tensile failure of mating bolt thread-strip load adequate for all standard electrical assembly applications. Brass nuts should not be paired with Grade 10.9 or higher steel bolts in high-preload structural connections as the nut may strip before the bolt fails. For electrical hardware applications (standard clamp loads), property class 04 brass hex nuts with Grade 4.6, 4.8, or 5.8 steel bolts—or with brass, copper, or silicon bronze bolts—are fully adequate.

Pricing

Brass DIN 934 hex nuts are priced at USD 13.50 per kilogram (EXW Jamnagar, India). All sizes M1.6–M36 available from stock or short production run. MOQ: 10 kg per size. Volume pricing available for OEM annual agreements and stocking distributors.

Key Features

• Full range M1.6 to M36 in DIN 934 / ISO 4032 standard profile
• CW614N (CZ121) free-cutting brass – standard; lead-free CW617N available
• Non-magnetic, moderate conductivity – suitable for electrical hardware
• Thread forms: metric coarse (standard), metric fine, UNC, UNF, BA (0BA–10BA)
• Surface options: bare, nickel, tin, chrome, zinc, gold plated
• ISO 9001:2015 manufactured; EN 10204 3.1 MTR; REACH/RoHS declarations
• All sizes stocked or short-notice production for MRO and production supply

Compatibility with Cable Glands and Conduit Fittings

Brass DIN 934 hex nuts are the standard locknut for metric-thread cable glands (M12 to M63) and conduit fittings. Cable gland thread engages the nut 6H thread, and the AF dimension matches standard installation spanners. For PG-thread applications (PG7–PG48), a PG hex nut (thin profile) is required; for metric-thread cable glands, the standard DIN 934 height is appropriate. Brass cable gland locknuts are supplied as separate items or as part of pre-assembled cable gland kits for panel builders.

Non-Magnetic Properties for CT and Transformer Applications

Brass hex nuts are non-magnetic (magnetic permeability ≈ 1.0), making them essential in current transformer (CT) secondary terminal connections where ferromagnetic fasteners would distort the magnetic flux path and introduce measurement errors. In power transformer tank earthing connections, CT mounting brackets, and protection relay terminal blocks, brass nuts are specified to ensure accurate CT operation and to avoid any magnetic flux bridging through the fastener assembly. Similarly, in MRI-adjacent and magnetically sensitive measurement installations, all-brass hardware including DIN 934 nuts ensures zero magnetic interference.

Corrosion Resistance for Panel and Switchgear Applications

Bare brass hex nuts are adequate for indoor panel and switchgear applications in clean, non-corrosive environments (Pollution Degree 1–2 per IEC 60664). For coastal, tropical high-humidity, or chemical-atmosphere environments, nickel-plated brass nuts provide 300+ hours NSS resistance while maintaining thread compatibility with brass bolts and screws. For outdoor and wet locations, silicon bronze hex nuts are recommended as the technically superior material.

Technical Specifications

Brass Material Grades – International Equivalents

Product Variants

Applications in Industry

Manufacturing Process

Brass DIN 934 hex nuts are produced by cold forging (M1.6–M16) on multi-station progressive header machines from brass wire, and by hot forging + CNC tapping for larger sizes M20–M36. In cold forging, brass wire is drawn to precise diameter, blanked and progressively formed through die stages to produce hexagonal profile and initial through-hole punch. Tapping follows on automatic tapping machines. For miniature sizes (M1.6–M3), Swiss-type CNC lathes are used for precision turning and tapping. All nuts undergo 100% GO/NO-GO thread plug gauging. AF and height dimensional sampling per ISO 3269. Surface quality is inspected visually and optically on automated sorting systems for burr, chip, and seam defects.

Quality Standards and Certifications

Why Choose Electrical Accessories India

• Full range M1.6–M36 in DIN 934 – no split sourcing needed
• Metric, inch UNC/UNF, and BA thread all available from one manufacturer
• Lead-free grades (CW617N) for RoHS/REACH compliant European electrical OEMs
• USD 13.50/kg – competitive OEM and distributor pricing
• Stocked inventory for most common sizes (M4–M24) for short-notice dispatch
• Custom surface finishes – nickel, tin, chrome, gold plated to order
• ISO 9001:2015 with EN 10204 3.1 MTR and REACH/RoHS declarations

Frequently Asked Questions (FAQ)

1. What is the difference between DIN 934 and ISO 4032 brass hex nuts?

DIN 934 and ISO 4032 are technically the same standard for hexagon nuts. DIN 934 is the German standard (older designation still widely used commercially), and ISO 4032 is the ISO equivalent. Dimensions, thread tolerances, and property class designations are identical. Both designations are acceptable and interchangeable in procurement specifications.

2. What size range of brass DIN 934 nuts do you keep in stock?

We keep in stock M2, M3, M4, M5, M6, M8, M10, M12, M16, M20, M24 in standard DIN 934 profile from CW614N brass. M1.6, M2.5, M28, M30, M36, and metric fine thread sizes are manufactured to order within 1–2 weeks for small quantities.

3. Can brass DIN 934 nuts be used with stainless steel bolts?

Yes. Brass nuts with stainless steel (A2/A4) bolts are a common combination in electrical panel assembly. Galvanic difference is moderate and acceptable in dry indoor environments. The brass nut’s lower hardness means the stainless bolt thread is unlikely to be damaged by the softer nut during assembly.

4. Are lead-free brass hex nuts available for European OEMs?

Yes. Lead-free brass DIN 934 hex nuts in CW617N (DZR brass, max 0.09% Pb) are available for electrical OEMs supplying European markets under RoHS Directive 2011/65/EU. REACH SVHC declaration and RoHS compliance certificate provided.

5. What surface finish is best for humid tropical environment panel nuts?

Nickel-plated brass DIN 934 nuts (3–8 µm electrolytic nickel) are recommended for tropical humid environments (IEC 60068-2-78 endurance). They provide 300+ hours NSS resistance while maintaining thread compatibility with standard brass bolts and screws.

6. Do you supply brass DIN 934 nuts with spring washers and flat washers as sets?

Yes. Brass nut + brass flat washer + brass spring washer sets (DIN 934 + DIN 125 + DIN 127 profiles) are supplied as kits for panel assembly. Stainless steel spring washer + brass flat washer + brass nut combinations are also available. Contact us for kit pricing.

7. What is the typical lead time for M36 brass DIN 934 nuts?

M36 DIN 934 brass hex nuts: 3–5 weeks from order. Quantity dependent – small quantities (10–50 kg) may be available sooner. For transformer OEM projects requiring M36 nuts in quantity, advance planning with 6–8 weeks lead time is recommended.

8. Can you supply brass hex nuts to transformer manufacturer requirements (BHEL, ABB, Siemens)?

Yes. We have experience supplying brass fasteners to major transformer OEMs including BHEL, ABB India, Siemens India, TAIM, Crompton Greaves, and export customers in Europe and the Middle East. We provide EN 10204 3.1 MTR, dimensional reports, and chemical analysis certificates per OEM procurement requirements.

9. What are the most common sizes for cable gland application?

For metric cable gland locknuts: M16×1.5, M20×1.5, M25×1.5, M32×1.5 are the most commonly used in panel construction. For PG-thread applications: PG9, PG11, PG13.5, PG16, PG21. Our brass panel nuts section covers the complete range of thin-profile cable gland locknuts.

10. Are BA thread brass nuts available for legacy UK switchgear maintenance?

Yes. 0BA to 10BA brass hex nuts are stocked in DIN 934 profile height for maintenance of legacy UK electrical equipment including GEC, Reyrolle, AEI, English Electric switchgear and protection relay panels. Contact us with your BA size requirements.

Equivalent Terms and Multilingual Reference

Related Products and Linked Terms

• Brass Machine Screws
• Brass Panel Nuts
• Copper Bolts, Copper Hex Set Screws
• Silicon Bronze Hex Nuts
• Brass Standoffs
• Brass Spacers
• Brass Thumb Screws
• DIN 934 brass nuts, hex nuts for transformers, brass cable gland nuts, electrical grade brass nuts, non-magnetic hex nuts, IS 1364 brass nuts

Request a Quote

Electrical Accessories India supplies brass DIN 934 hex nuts to transformer OEMs, switchgear manufacturers, panel builders, EPC contractors, and electrical distributors worldwide. Pricing: USD 13.50 per kilogram (EXW Jamnagar, India). Full range M1.6–M36 available. Contact us for OEM pricing, stocking distributor agreements, and project BOM quotations.

Email: info@elecaccs.com | Location: Jamnagar, Gujarat, India

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