Brass Fixed and Swivel Connectors for Flexible Conduits

Brass Fixed and Swivel Connectors for Flexible Conduits are nickel-plated brass fittings used to join flexible metallic and non-metallic conduits to enclosures, junction boxes, and equipment housings in industrial wiring systems. Manufactured by Cable Glands India across the full M16 to M75 metric thread range, fixed connectors provide a rigid, non-rotating joint while swivel connectors incorporate a rotating collar that allows angular alignment of the conduit run. Both types are supplied with a bright nickel-plated finish for corrosion resistance and EMI continuity, serving electrical OEMs, EPC contractors, power utilities, and panel builders worldwide.

Detailed Product Overview

What Are Fixed and Swivel Flexible Conduit Connectors

Fixed and swivel connectors are threaded adaptors that terminate a flexible conduit at an enclosure, machine housing, or junction box while maintaining mechanical protection and, where required, ingress protection for the cables running inside the conduit. The fixed type presents a single rigid axis between the conduit and the mounting thread, suited to installations where the conduit run approaches the entry point in a straight line. The swivel type adds a rotating joint at the body, allowing the conduit to be angled after installation without twisting the conduit itself, which simplifies routing in congested panels and machinery.

Nickel-Plated Brass Construction

Both connector types are machined from solid brass bar stock and finished with an electrodeposited nickel layer, typically 8-12 microns thick. The nickel plating provides a hard, corrosion-resistant surface that withstands repeated handling, washdown, and industrial atmospheres, while preserving the electrical continuity of the brass body for earthing and EMI/RFI shielding continuity between the conduit armour and the connected enclosure. Nickel-plated brass is specified in preference to plated steel or plastic where long-term corrosion resistance and continuity are both required.

Fixed Connector Design and Application

The fixed connector body consists of a conduit entry with a compression or clamping ring at one end and a parallel or tapered mounting thread at the other. Once tightened, the connector holds the conduit rigidly in line with the enclosure wall, providing a stable, vibration-resistant termination. Fixed connectors are typically specified where the conduit route is fixed by design and no angular adjustment is required after installation, such as machine-mounted junction boxes and control panel glanding plates.

Swivel Connector Design and Application

The swivel connector adds a rotating collar between the conduit-gripping section and the mounting thread, secured by a retaining ring that permits 360-degree rotation while maintaining a sealed, mechanically secure joint. This allows the installer to route the flexible conduit at the required angle after the connector body has been tightened into the enclosure, which is particularly useful on machinery with multiple conduit entries at varying angles, or where field conditions differ from the original design layout.

Thread Range and Conduit Size Coverage – M16 to M75

Our fixed and swivel connectors are manufactured across the full M16 to M75 metric thread range, covering flexible conduit nominal sizes from small instrumentation conduits up to heavy industrial conduit used for motor feeders and large control panel entries. This range allows a single connector family to be specified across an entire installation, from small sensor and instrumentation wiring through to high-current power and motor circuits, simplifying procurement and stock-keeping for OEMs and panel builders.

Sealing and Ingress Protection

Where specified, connectors are supplied with sealing rings or gaskets at the conduit entry and mounting thread to achieve IP66 or IP68 ingress protection, preventing the entry of dust and water at the termination point. This is important in outdoor, washdown, and process industry installations where the enclosure itself is rated for a specific ingress protection class that must be maintained at every conduit entry.

Compatibility with Flexible Conduit Types

Fixed and swivel connectors are designed to accept standard flexible metallic conduit (galvanised or stainless steel convoluted or interlocked types) as well as PVC-covered flexible metallic conduit used in washdown and corrosive environments. Conduit-gripping sections are matched to the conduit’s outer profile to ensure a secure mechanical retention and, where fitted, a consistent seal under the gasket.

Standards Compliance and Certification Framework

Connectors are manufactured to comply with IEC 61386 conduit system requirements, EN 60423 thread designations, and relevant IP testing per IEC 60529. Export variants are verified against ATEX/IECEx requirements where used in hazardous area installations, and material composition conforms to IS 319 / EN 12164 brass grades. RoHS and REACH compliance is maintained for all finishes.

Key Features

• Manufactured across the full M16 to M75 metric thread range
• Available in Fixed (rigid) and Swivel (360-degree rotating) configurations
• Bright nickel-plated brass body for corrosion resistance and EMI continuity
• IP66 / IP68 sealing options for outdoor and washdown installations
• Compatible with metallic and PVC-covered flexible conduit
• Compression or clamping-ring conduit retention for secure mechanical grip
• Suitable for hazardous area installations in ATEX/IECEx-rated variants
• Consistent thread tolerances for reliable enclosure mounting

Nickel-Plated Corrosion Protection

The nickel plating layer resists oxidation, abrasion, and chemical attack far better than bare brass, extending service life in outdoor switchgear, marine deck equipment, and process plant installations. Because nickel is applied electrolytically over a machined brass substrate, the finish remains uniform across threads and sealing faces, ensuring consistent torque behaviour during installation and reliable long-term sealing performance.

Fixed Connector Rigidity

Where vibration or mechanical loading is present, the fixed connector’s single-axis design avoids the additional moving parts of a swivel joint, reducing the number of wear points in the assembly. This makes fixed connectors the preferred choice for motor terminal boxes and vibrating machinery where a rigid, maintenance-free termination is required over the life of the installation.

Swivel Connector Rotational Freedom

The swivel collar allows the conduit to be rotated through 360 degrees after the connector body is fixed in the enclosure wall, which avoids inducing torsional stress on the conduit during routing. This is particularly valuable on retrofit projects and multi-entry panels where conduit routes must be adjusted on site to avoid other equipment.

Wide Thread Range Standardisation (M16-M75)

Standardising on one connector family across the M16-M75 range allows EPC contractors and panel builders to reduce the number of distinct part numbers held in inventory, simplify installer training, and maintain consistent quality and finish across all conduit entries on a project, from small control wiring to heavy power conduit.

IP66/IP68 Sealing Performance

Sealing rings fitted at the conduit entry and enclosure mounting face maintain the ingress protection rating of the enclosure itself, which is essential for outdoor kiosks, washdown food and beverage equipment, and marine deck junction boxes where water ingress at a cable entry point is a common failure mode.

ATEX/IECEx Hazardous Area Compatibility

Where required, connectors are supplied in variants suitable for use with certified conduit systems in Zone 1/2 and Zone 21/22 hazardous area installations, maintaining the flameproof or increased-safety integrity of the conduit run at the point of termination.

Technical Specifications

Raw Material Grades

International Equivalent Standards

Product Types / Variants – Size Chart (M16-M75)

Custom threads including PG, NPT, and BSP are available on request, alongside intermediate sizes for specific enclosure or conduit manufacturer requirements.

Applications in Industry

• Control panels and motor control centres (MCCs)
• Machine and equipment wiring in manufacturing plants
• Outdoor switchgear and kiosk installations
• Food and beverage washdown equipment
• Oil, gas, and petrochemical hazardous area installations
• Marine and offshore deck junction boxes
• Renewable energy (solar and wind) electrical enclosures
• Railway signalling and traction equipment enclosures

Manufacturing Process

Manufacturing begins with certified brass bar stock, which is CNC turned to form the conduit-entry, body, and mounting thread sections. Fixed connector bodies are threaded and deburred in a single setup, while swivel connectors additionally require machining of the rotating collar and retaining groove before assembly with a captive O-ring or retaining circlip. Components are then electroplated with nickel to the specified thickness, assembled with sealing rings where required, and subjected to thread gauge inspection, torque testing, and IP sealing verification prior to packing.

Quality Standards and Certifications

Why Choose Cable Glands India

• Complete M16 to M75 thread range manufactured in-house on CNC machines
• Fixed and Swivel variants engineered for consistent sealing and torque performance
• In-house nickel electroplating with controlled thickness and salt-spray verification
• ATEX/IECEx-compatible variants for hazardous area projects
• Batch-wise thread gauge, torque, and IP-sealing quality inspection
• Established export documentation and packing for global project shipments

Indicative Pricing

Final pricing depends on thread size, connector type (Fixed/Swivel), sealing specification, and order volume. Contact our sales team for a formal quotation.

Frequently Asked Questions

What is the difference between a fixed and a swivel conduit connector?

A fixed connector holds the conduit rigidly in line with the mounting thread, while a swivel connector incorporates a rotating collar allowing the conduit to be angled after installation.

What thread sizes are available?

Our standard range covers M16 to M75 metric threads, with PG, NPT, and BSP variants available on request.

What ingress protection rating do these connectors achieve?

IP66 or IP68 when fitted with the appropriate sealing ring at the conduit entry and mounting face.

Why is nickel plating used instead of bare brass?

Nickel plating provides superior abrasion and corrosion resistance while maintaining the electrical continuity of the brass body for earthing and EMI shielding.

Are these connectors suitable for hazardous area installations?

Yes, ATEX/IECEx-compatible variants are available for Zone 1/2 and Zone 21/22 installations when used with certified conduit systems.

What types of flexible conduit are compatible?

Standard galvanised or stainless steel convoluted/interlocked conduit and PVC-covered flexible metallic conduit.

Can these connectors be supplied with custom threads?

Yes, PG, NPT, BSP, and other custom thread forms can be manufactured to specification.

Do you provide test and material certificates?

Yes, mill test certificates and batch inspection reports are provided with every shipment.

What is the production lead time?

Standard lead time is 4-6 weeks depending on size, type, and order quantity.

Do you export internationally?

Yes, we export to the USA, UK, Europe, Middle East, Africa, and Southeast Asia.

Equivalent Terms in Other Languages

Related Parts and Linked Terms

• Brass Electrical Accessories
• Brass Battery Terminals
• Brass Terminals Blocks
• Brass Line Taps and Brass Split Bolt Connectors
• Brass Conduit Bushes – Male and Female Brass Bushes
• Brass Connectors for Flexible Conduits (Overview)

Request a Quote

Share your thread sizes, connector type (Fixed/Swivel), sealing requirements, and quantities, and our engineering team will respond with a detailed quotation within one business day.

Email: sales@cableglandsindia.com | Phone / WhatsApp: +91-22-43449300 | Website: www.cableglandsindia.com