Brass Hex Nuts, Brass Full Nuts

Precision Brass Hex Full Nuts for Electrical, Panel and Industrial Fastening

Cable Glands India manufactures brass hex nuts (full nuts) machined and hot-forged from certified free-cutting brass bar to DIN 934, ISO 4032, BS 1083 and IS 1364 dimensional standards. These hexagonal internally-threaded fasteners are supplied in metric (M2-M64), BSW, BSP and UNC/UNF thread series for use with matching brass, steel and stainless studs and bolts across cable gland assemblies, switchgear panels, busbar joints, earthing systems and general electrical/mechanical fastening. Every batch is thread-gauged, dimensionally inspected and supplied with mill test certificates. Price: US$ 14.50/kilogram (FOB/CIF Indian port, ex-works Mumbai, price subject to order quantity, thread size and finish).

Product Overview

Brass hex full nuts, also referred to as hexagon nuts or standard hex nuts, are six-sided internally threaded fasteners used opposite a bolt, screw or stud to create a clamped joint. Unlike thin nuts or lock nuts, a full nut carries the complete thread height specified by its governing standard, giving it full proof-load and tensile capacity for structural and current-carrying joints. Cable Glands India produces full nuts from solid brass bar on CNC lathes and multi-spindle screw machines, ensuring concentricity between the hexagon flats and the tapped bore, which is critical for consistent spanner engagement and thread seating in high-volume assembly lines.

Thread tapping is held to 6H tolerance class as standard, giving reliable running fit with 6g external threads on mating bolts and studs without excessive play or galling. Facing and chamfering of both nut faces is performed in the same operation to remove burrs and permit smooth hand-starting of the nut onto the bolt, an important consideration for panel builders and EPC site crews assembling large quantities of terminations and busbar joints under time pressure.

Because brass is non-sparking and non-magnetic, hex full nuts machined from CuZn alloys are specified wherever electrical continuity, corrosion resistance and spark-safety are simultaneously required, such as earthing bars, transformer terminal connections, meter box assemblies and hazardous-area junction boxes. The natural conductivity of brass also makes these nuts suitable for low-resistance current-carrying joints in busbar and grounding applications where a plated steel nut would introduce an unwanted resistance interface.

Dezincification resistance is an important selection criterion for nuts used outdoors or in humid coastal and industrial atmospheres. Cable Glands India offers hex full nuts in standard CuZn39Pb3 (C38500/CW614N) free-cutting brass for general indoor and electrical use, and in DZR grade CW602N/CZ132 brass for outdoor, marine, water-contact and high-humidity installations where selective dezincification corrosion must be avoided over the service life of the joint.

Surface finish options include plain (natural) brass, electro-tin plating, nickel plating and passivation. Plain brass is standard for indoor electrical and panel work; nickel or tin plating is recommended where the nut is exposed to weather, salt-laden air or where galvanic compatibility with aluminium busbars and stainless hardware must be improved.

All hex full nuts are produced to consistent across-flats (A/F) and across-corners dimensions per the specified standard, ensuring compatibility with standard spanners, sockets, and torque wrenches used in panel-building and substation assembly. Batch traceability is maintained from raw material heat number through to finished, packed product, supporting quality audits by EPC contractors and utility procurement teams.

Cable Glands India supplies hex full nuts as a standalone fastener line and as a matched component within cable gland kits, earthing kits and terminal connector assemblies, allowing OEMs to single-source the nut alongside the bolt, washer and lug required to complete a termination.

Key Features

• Machined from certified CuZn free-cutting and DZR brass bar stock
• Manufactured to DIN 934, ISO 4032, BS 1083 and IS 1364 dimensions
• 6H thread tolerance class for reliable fit with 6g external threads
• Available in M2-M64 metric, BSW, BSP and UNC/UNF thread series
• Non-sparking, non-magnetic and electrically conductive
• Plain, tin-plated, nickel-plated and passivated finish options
• 100% thread-gauged and dimensionally inspected before dispatch
• Custom sizes, non-standard threads and blind/capped variants on request

Thread Precision and Fit Class

Every brass hex full nut leaving the Cable Glands India facility is tapped to 6H internal thread tolerance, the internationally recognised medium-fit class for general engineering and electrical fastening. This ensures the nut threads freely onto 6g-tolerance bolts and studs without binding, while retaining sufficient thread engagement to develop the full proof load of the fastener pair. Thread pitch diameter, major diameter and minor diameter are verified using go/no-go ring and plug gauges at set sampling frequency during production, and results are logged against the production batch for traceability.

Corrosion Resistance and Surface Treatments

Brass forms a stable oxide layer that resists atmospheric corrosion far better than uncoated carbon steel, making it the preferred material for outdoor electrical hardware, earthing connections and coastal installations. Where additional protection is required, Cable Glands India applies electro-tin or nickel plating, both of which improve solderability, reduce contact resistance drift, and provide a bright, uniform finish for visible panel hardware. DZR brass grades are recommended specifically where the nut will see prolonged water contact or high chloride exposure.

Material Purity and Dezincification Resistance

Standard free-cutting brass (CuZn39Pb3) offers excellent machinability but can be susceptible to dezincification in aggressive water chemistries. For nuts destined for plumbing-adjacent, marine, or outdoor humid environments, we recommend and stock DZR brass (CW602N/CZ132), which includes controlled arsenic additions and restricted zinc content to suppress the dezincification mechanism, extending service life significantly over standard brass in these conditions.

Load-Bearing Capacity and Torque Retention

Full nuts, by definition, carry the complete thread height defined in DIN 934/ISO 4032, giving them the full proof load rating of the brass grade used, unlike thin or jam nuts which sacrifice thread engagement for a lower profile. This makes full nuts the correct choice wherever the joint must resist vibration loosening, thermal cycling or repeated torque-retorque cycles, such as busbar terminations, transformer connections and structural panel assembly.

Custom Sizes and Non-Standard Threads

Beyond catalogue metric and BSW/BSP sizes, Cable Glands India regularly manufactures hex nuts to custom across-flats dimensions, non-standard pitches, extended thread depths, and blind (capped) configurations for OEM assemblies where a standard nut does not fit the mating housing or aesthetic requirement. Drawings, samples or existing part references are accepted for custom tooling and first-article approval before full production release.

Compliance with International Standards

Dimensional and mechanical compliance is verified against DIN 934, ISO 4032, ANSI/ASME B18.2.2, BS 1083 and IS 1364 as applicable to the destination market, allowing distributors and EPC contractors to specify Cable Glands India hex nuts as direct equivalents to locally-branded fasteners in tender documentation and bills of materials.

Technical Specifications

Raw Material Grades

International Equivalent Standards

Product Types / Variants

Applications in Industry

Brass hex full nuts manufactured by Cable Glands India are used across electrical, electromechanical and general engineering assemblies, including: cable gland body and earthing tag fastening; switchgear and control panel busbar and terminal connections; transformer and substation grounding hardware; distribution board and meter box assembly; solar and battery earthing/bonding kits; instrumentation panel and junction box fastening; and general OEM assembly where a non-magnetic, corrosion-resistant nut is specified. EPC contractors and panel builders specify brass nuts in preference to plated steel wherever electrical continuity, spark-safety or long-term corrosion resistance in outdoor enclosures is a design requirement.

Manufacturing Process

Quality Standards and Certifications

Cable Glands India manufactures brass hex full nuts under an ISO 9001 certified quality management system. Products are manufactured to conform with DIN 934, ISO 4032, BS 1083, IS 1364 and ASME B18.2.2 dimensional standards, and raw brass is sourced against mill test certificates confirming chemical composition. RoHS and REACH compliance documentation is available for plated finishes on request. Salt-spray corrosion testing (ASTM B117) can be performed on request for plated and DZR-grade batches supplied for coastal or marine projects. Customers should request the specific certification package relevant to their project at the time of enquiry, as certification scope varies by grade, finish and order quantity.

Why Choose Cable Glands India

• In-house CNC turning, forging and tapping capability for full process control
• Consistent thread quality verified by gauge inspection on every batch
• Choice of standard, DZR and naval brass grades for corrosion-critical projects
• Custom sizes, threads and finishes engineered to customer drawings
• Export packing and documentation for direct container/LCL shipment worldwide
• Transparent per-kilogram pricing with no hidden tooling charges on standard sizes

Frequently Asked Questions

What is a brass hex full nut?

A brass hex full nut is a six-sided, internally threaded fastener machined to the full thread height specified by its governing standard (such as DIN 934 or ISO 4032), used with a bolt or stud to clamp a joint, offering full proof-load capacity compared with a thin or lock nut.

Which thread standards are available?

Cable Glands India supplies brass hex full nuts in metric (DIN 934/ISO 4032), BSW/BSP, and UNC/UNF thread series from M2/#4 up to M64/2 inch, with custom pitches available on request.

What is the difference between a hex full nut and a lock nut?

A full nut carries the complete standard thread height for maximum load capacity, while a lock nut (thin nut or nylon-insert nut) is designed primarily to resist loosening under vibration, often at reduced thread height.

Which brass grade should I choose?

Standard CuZn39Pb3 (C38500) suits general indoor electrical and panel applications; DZR brass (CW602N/CZ132) is recommended for outdoor, marine or water-contact use; naval brass (C46400) is used where higher strength and seawater resistance is required.

Are brass hex nuts corrosion resistant?

Brass naturally resists atmospheric corrosion better than uncoated steel. For aggressive humid, coastal or water-contact environments, DZR grade or plated (tin/nickel) finishes are recommended to prevent dezincification and long-term surface degradation.

What is the minimum order quantity?

Standard catalogue sizes are available from small trial quantities; custom sizes, threads or finishes may carry a minimum order quantity depending on tooling requirements. Contact our sales team with your specification for a quotation.

Can non-standard sizes or threads be manufactured?

Yes. Cable Glands India regularly produces hex nuts to custom across-flats dimensions, special pitches, extended depths and blind/capped configurations based on customer drawings or samples.

What certifications are provided?

Mill test certificates confirming material composition are issued as standard. ISO 9001 manufacturing compliance, RoHS/REACH documentation and salt-spray test reports can be provided on request depending on grade and finish ordered.

What is the price of brass hex nuts?

Standard pricing is US$ 14.50 per kilogram (FOB/CIF Indian port), varying with thread size, brass grade, finish and order quantity. Contact us for a formal quotation against your specification.

What is the typical lead time for export orders?

Standard sizes in stock grades typically ship within 2-3 weeks of order confirmation; custom sizes and finishes may require 4-6 weeks including first-article approval, depending on quantity.

Equivalent Terms in Other Languages

Related Products and Linked Parts

• Brass Lock Nuts
• Brass Panel Nuts
• Brass Square Nuts
• Brass Flat Head CSK Head Machine Screws
• Brass Washers, Pressed Washers
• Brass Bolts
• Brass Anchors
• Brass Fasteners (Category)

Request a Quote

Cable Glands India supplies brass hex full nuts worldwide to electrical OEMs, EPC contractors, power utilities and distributors, at US$ 14.50/kilogram (FOB/CIF Indian port). Send your drawing, thread size, grade and quantity requirement to sales@cableglandsindia.com or call +91 22 4344 9300 for a formal quotation and sample dispatch.