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Engineered for demanding industrial bulkheads, thick panel enclosures, and explosion-proof distribution cabinets.
Overcoming spatial, mechanical, and environmental constraints in thick-wall enclosures and demanding automated infrastructure.
In modern industrial electrical engineering, cable glands are frequently viewed as modest mechanical fasteners, yet they serve as the primary defensive barrier preserving system integrity, ingress isolation, and flameproof containment. While standard cable glands typically provide entry thread lengths between 6mm and 12mm, modern industrial installations increasingly employ thick-walled cast aluminum housings, structural steel enclosures, explosion-proof explosion boxes, heavy marine bulkheads, and double-walled insulated junction boxes. These structural configurations render standard entry lengths inadequate, creating an urgent market demand for precision-engineered Long Thread Cable Glands featuring engagement thread lengths extending from 15mm to 35mm and beyond.
The rapid escalation of Industry 4.0 automation, gigawatt-scale renewable energy farms, offshore marine infrastructure, and electrified railway transit has transformed electrical entry design. A long thread cable gland does not merely compensate for wall thickness; it provides vital engagement depth to accommodate internal grounding locknuts, star washers, EMC earth continuity tags, and thick outer sealing O-rings without compromising mechanical pull-out strength or IP-rated weather seals.
Ensures a minimum of 5 to 7 full thread engagements across cast iron, thick cast aluminum, thermoset polyester, and heavy structural panels up to 25mm wall thickness.
Continuous submerged performance under 5 to 10 bar hydraulic pressure combined with resistance to high-pressure cyclic steam washdowns in harsh manufacturing environments.
Integrated high-tensile collet claw systems deliver exceptional strain relief, absorbing extreme vibration and preventing conductor pull-out under heavy industrial loads.
Where standard thread lengths fail, long thread cable glands deliver uncompromised mechanical reliability and absolute environmental sealing.
Heavy mechanical engineering, including injection molding machines, forging presses, CNC milling centers, and hydraulic power units, utilizes heavy cast iron or sand-cast aluminum junction boxes to resist mechanical impact. These enclosure walls consistently exceed 12mm in thickness. Long thread Metric (M16 to M63) and NPT (1/2" to 3") cable glands permit direct threaded entry into tapped blind or through-holes, maintaining rigid structural clamping while completely eliminating the risk of thread stripping under high dynamic torque.
Furthermore, the extended thread shank leaves sufficient internal clearance inside the enclosure to mount anti-vibration serrated locknuts and earthing tags, ensuring unshakeable EMC shielding grounding paths for variable frequency drive (VFD) power cables.
Utility-scale solar farms and modern multi-megawatt wind turbines expose electrical connections to punishing meteorological swings. Solar central inverter enclosures and DC combiner cabinets often employ double-skin insulated walls or reinforced GRP (Glass Reinforced Polyester) construction to prevent internal condensation and overheating.
Long thread nickel-plated brass and UV-stabilized Polyamide 66 cable glands effortlessly penetrate both inner and outer housing walls. Equipped with high-grade EPDM or fluororubber (FKM) sealing inserts, these glands maintain continuous IP68 sealing despite daily solar heat cycling that causes standard plastics to loosen and crack over time.
In Zone 1, Zone 2 (Gas) and Zone 21, Zone 22 (Combustible Dust) hazardous industrial installations, cable entries must satisfy stringent ATEX, IECEx, and UL 1203 explosion-proof standards. Flameproof "Ex d" enclosures require a specified minimum number of fully engaged threads (typically 5 to 7 threads) to quench and cool escaping hot gases before they can ignite surrounding ambient atmospheres.
Long thread explosion-proof glands provide certified flame-path length across explosion-proof motor connection boxes, offshore refinery control stations, and chemical metering skids, guaranteeing full compliance and absolute plant safety.
Evaluating structural, mechanical, and electrical parameters across industrial installation criteria.
| Performance Parameter | Standard Thread Gland | Long Thread Industrial Gland | Industrial Benefit |
|---|---|---|---|
| Entry Thread Length (L) | 6.0 mm – 12.0 mm | 15.0 mm – 35.0 mm+ | Accommodates thick walls, cast alloys, and bulkheads effortlessly. |
| Max Wall Thickness | Up to 4.0 mm with locknut | Up to 24.0 mm with locknut | Eliminates the need for counterbores or custom machining on panels. |
| Thread Engagement Count | 2 – 4 Threads engaged | 6 – 12+ Threads engaged | Superior mechanical pull-out strength and structural seismic integrity. |
| EMC Grounding Accessories | Constrained / Insufficient clearance | Full clearance for Earth Tag & Locknut | Reliable 360-degree shielding continuity for high-noise VFD cables. |
| Flameproof Flame-Path (Ex d) | Limited to thin sheet enclosures | Fully compliant for thick Ex d casings | Meets mandatory ATEX / IECEx flame path quenching dimensions. |
| Ingress Sealing Under Load | IP65 to IP68 (shallow) | IP68 (10 bar) / IP69K continuous | Zero water penetration under high pressure, washdowns, and submersion. |
Selecting optimal alloys and elastomeric compounds to endure extreme chemical, thermal, and mechanical stress.
Provides superior mechanical hardness, high tensile resistance, and electrical conductivity. The galvanic nickel electroplating offers exceptional surface protection against oxidation, coastal salt spray, and mild industrial acids while preventing galvanic corrosion when mounted against aluminum enclosures.
The ultimate selection for offshore oil & gas platforms, marine shipbuilding, food & beverage washdown areas, and aggressive chemical processing plants. AISI 316L grade delivers unparalleled resistance to pitting corrosion in high-chloride marine environments.
Engineered with virgin nylon polymer reinforced for high impact resistance, halogen-free flame retardance (V-0 rating), and outstanding resistance to dynamic thermal cycling. UV-stabilized formulations ensure a 25-year service lifespan in outdoor solar applications.
Zhejiang Hongxiang Connector Co., Ltd. (Zhejiang Hoonsun Cable Gland Co., Ltd.)
Founded in 2006, Zhejiang Hongxiang Connector Co., Ltd. is rooted in Yueqing, Zhejiang — a national hub for precision electrical manufacturing in China. After nearly two decades of dedicated development, the company has evolved into a large modern industrial connectivity solutions provider integrating R&D and design, large-scale intelligent manufacturing, global sales, and one-stop services. It stands as a benchmark enterprise of considerable scale and influence in China’s cable gland and connector industry, and a key player among national high-tech enterprises.
Boasting a modern intelligent manufacturing industrial park, the company operates a standardized production workshop of over 10,000 square meters, equipped with multiple high-precision automated production lines, CNC machining centers, and a full-process quality control laboratory, establishing an industry-leading large-scale manufacturing system. With a core team of more than 300 professionals — over 30% of whom are R&D and quality management personnel — its annual production capacity exceeds 80 million units. The company is fully capable of handling large-volume orders, urgent custom projects, and long-term strategic supply partnerships for domestic and international clients, ranking among the industry’s top tier in both production capacity and delivery efficiency.
Its core product portfolio includes metal cable glands, nylon cable glands, waterproof cable glands, explosion-proof connectors, conduit fittings, and various customized connecting accessories. These products serve high-end sectors such as industrial electrical equipment, new energy equipment, rail transit, shipbuilding and heavy industry, construction machinery, military supporting facilities, and communication & industrial control. Adhering to stringent manufacturing standards and uncompromising quality requirements, the company has obtained a series of internationally recognized certifications, including ISO9001, IATF16949 automotive quality management system, CE, UL, ATEX explosion-proof certification, RoHS, and IP68 high-protection rating. Its core technologies and product performance have reached international advanced levels, with nearly 100 invention and utility model patents to its name, continuously driving technological upgrading across the industry.
Two decades of technological evolution, precision engineering breakthroughs, and global expansion.
Yueqing Hoonsun Cable Gland Manufacturing Co., Ltd. was established, focusing primarily on high-precision waterproof brass cable glands.
Factory relocated to expand production, with the standardized workshop area reaching 2,000 square meters.
Introduced numerical control (CNC) equipment and automated counting systems, initiating automated precision production.
Developed an innovative high-reliability cable sealing architecture and secured patent protection (Patent No. ZL201020530888.7).
Honored as the certified supplier of special waterproof cable glands for the Aircraft Carrier "Liaoning", earning global recognition for extreme-reliability quality.
Expanded R&D into diverse materials, including marine-grade stainless steel, high-temperature polyamide, and specialized brass alloys.
Team expanded to over 80 specialists, accelerating international trade and securing global distribution partnerships.
Enterprise relocation and modernization; launched refreshed global brand identity with upgraded automated production workshops.
Corporate restructuring upgraded the enterprise name to Zhejiang Hoonsun Cable Gland Co., Ltd., scaling up R&D investments.
Factory expanded to over 120 staff and 200+ advanced production units, aggressively supplying global photovoltaic, wind power, and EV infrastructure markets.
To ensure uncompromised safety across heavy industrial, hazardous explosion-proof, and harsh marine installations, Hoonsun cable glands undergo rigorous verification by premier global testing bodies. Our complete series complies with UL, CE, ATEX, RoHS, ISO9001, and IATF16949 international standards, providing engineers and procurement specialists with verified reliability.
Explore All Certificates & Test Reports
Equipped with more than 200 high-precision CNC machining centers, automated assembly units, and state-of-the-art laboratory testing apparatus.
Browse our certified industrial product line designed for deep threading, explosion containment, multi-core cable entry, and extreme IP68 environmental sealing.
