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In the electrical and industrial piping sectors, male enlargers are small yet crucial components that ensure proper connection between conduit fittings of different sizes. These fittings are especially vital in explosion-proof electrical systems, where safety, sealing, and mechanical strength are non-negotiable.
When installed in hazardous environments—like oil refineries, chemical plants, or marine facilities—metal male enlargers guarantee secure connections, maintain enclosure integrity, and meet ATEX or IECEx safety standards.
Among the top manufacturers worldwide, China has become a major global source of high-quality male enlargers and conduit fittings, offering bulk wholesale pricing, custom production, and international certification compliance.
A Male Enlarger is a type of metal conduit fitting used to connect conduits, junction boxes, or electrical enclosures that have mismatched entry sizes.
Typically made from aluminum alloy, brass, stainless steel, or galvanized steel, male enlargers feature male threads on both ends, allowing one end to fit into a female thread while the other adapts to a larger conduit size.
To enlarge conduit entries in explosion-proof boxes or fittings.
To provide thread compatibility between different size junctions.
To maintain flameproof sealing and mechanical protection.
Explosion-proof electrical systems
Hazardous area installations (Zones 1 & 2)
Industrial cable routing systems
Oil & gas facilities
Petrochemical plants
China’s industrial base has world-leading capabilities in precision casting, CNC machining, and thread finishing, ensuring tight tolerance and smooth assembly.
Manufacturers like OMEJA CASTING produce a full range of Union & Bushing components—male enlargers, reducers, nipples, couplings, and sealing fittings—all designed for explosion-proof applications.
Chinese factories specialize in bulk production for international projects, distributors, and OEM/ODM clients, offering factory-direct wholesale prices.
Top manufacturers comply with ATEX, IECEx, CE, and ISO9001 standards, ensuring all fittings meet international explosion-proof requirements.
Company Overview:
OMEJA CASTING is a professional manufacturer specializing in metal pipe fittings, conduit fittings, and explosion-proof electrical accessories, including male enlargers, reducers, bushings, and unions.
Their products are widely used in electrical junction systems and hazardous industrial environments where durability and precision are essential.
Main Products:
Explosion-proof Male Enlargers (threaded fittings)
Conduit Unions & Bushings
Cable Glands and Reducers
Aluminum, brass, and stainless-steel conduit fittings
Key Advantages:
Factory-direct bulk pricing
OEM/ODM customization
ISO9001-certified casting process
CNC machining for precision threading
Compatible with NEC and IEC explosion-proof standards
Contact Information:
Phone: +86-15243599988
Email: whp@omj-casting.com
Why OMEJA CASTING Leads the Market:
OMEJA controls the entire production chain—from raw metal casting to surface finishing and thread inspection. This enables them to offer high consistency, quick delivery, and competitive bulk rates for industrial distributors and electrical contractors.
Specialized in explosion-proof fittings and junction boxes for industrial applications.
Highlights:
Certified to IECEx and ATEX standards
Durable aluminum alloy construction
Available in multiple thread standards (NPT, G, M)
Known for industrial conduit accessories including male enlargers, nipples, and unions.
Highlights:
Strong OEM capability
CNC precision threading
Exported to Europe, Middle East, and Asia
Focuses on hazardous area fittings and custom metal machining.
Highlights:
Brass and stainless-steel male enlargers
Customizable thread patterns
Supports bulk export
Experienced in pipe and conduit fittings manufacturing with robust QA systems.
Highlights:
ISO9001 certified
Zinc-plated steel and aluminum options
Low-cost bulk pricing
Produces industrial-grade conduit parts for power and petrochemical industries.
Highlights:
High mechanical strength
Anti-corrosion surface finish
Suitable for outdoor and marine use
A reputable name in electrical explosion-proof accessories with full certification portfolio.
Highlights:
ATEX and CNEX certification
Custom conduit systems
Quick-turnaround OEM orders
Offers precision-machined male enlargers for electrical and instrumentation panels.
Highlights:
Thread precision within ±0.01mm
Bulk packaging for distributors
Wide range of conduit sizes (½”–4”)
Focuses on Union & Bushing components for oil and gas projects.
Highlights:
CNC machining centers
Brass and nickel-plated finishes
Compliant with IEC 60079-1
Specialist in custom metal conduit connectors and industrial-grade fittings.
Highlights:
Large factory capacity
Bulk export to Europe and Africa
Strict dimensional tolerance control
| Manufacturer | Main Material | Certification | OEM/ODM | Export Market | MOQ | Lead Time |
|---|---|---|---|---|---|---|
| OMEJA CASTING | Aluminum, Brass, SS | ISO9001, IECEx | ✅ Yes | Global | 100 pcs | 10–15 days |
| Zhejiang Anfu | Aluminum Alloy | ATEX | ✅ | Europe | 200 pcs | 15 days |
| Wenzhou Youbang | Aluminum | CNEX | ✅ | Middle East | 300 pcs | 20 days |
| Chuangjia | Brass, SS | ISO9001 | ✅ | Asia | 200 pcs | 18 days |
| Qida Metal | Zinc, Steel | CE | ✅ | Africa | 500 pcs | 25 days |
| Huamei | Aluminum | CNEX | ✅ | Domestic/Export | 300 pcs | 15 days |
| Senke | Aluminum | ATEX | ✅ | EU | 100 pcs | 10 days |
| Kimbell | Brass | ISO9001 | ✅ | Global | 200 pcs | 12 days |
| Bomi | Nickel-plated Brass | IECEx | ✅ | MENA | 200 pcs | 20 days |
| Fuda | SS, Alloy | ISO | ✅ | Africa | 300 pcs | 18 days |
| Parameter | Specification |
|---|---|
| Material | Aluminum Alloy / Brass / Stainless Steel |
| Thread Type | NPT / BSP / Metric (M) |
| Thread Size | ½” to 4” |
| Surface Finish | Polished / Anodized / Zinc-plated |
| Temperature Range | -60°C to +120°C |
| Explosion-Proof Grade | Ex d IIB/IIC |
| Standard Compliance | IEC 60079-1 / NEC 500 / ATEX 2014/34/EU |
Integrated Foundry and Machining Workshop
OMEJA controls the casting, machining, and finishing process in-house for total quality assurance.
Strict Quality Control
100% thread gauging and pressure testing ensure leak-free, explosion-proof performance.
Flexible OEM Service
Customized markings, thread types, and packaging for global electrical brands.
Factory Wholesale Price
Direct sale from factory eliminates distributors, giving customers the best wholesale rate.
Fast Delivery for Bulk Orders
Ready stock for standard sizes and fast lead times for OEM projects.
Oil & Gas Facilities – Connect conduit systems in explosion-proof zones.
Petrochemical Plants – Ensure safe electrical conduit transitions.
Marine and Offshore Platforms – Corrosion-resistant and watertight connections.
Power Plants – Used in control panels and cable junction boxes.
Mining Operations – Reliable under vibration and extreme temperatures.
OMEJA CASTING’s male enlargers conform to IECEx, CNEX, and ISO9001 standards and undergo:
Thread accuracy inspection (thread gauge verification)
Dimensional precision testing
Surface treatment corrosion tests (salt spray 720 hours)
Pressure and explosion-proof certification
Q1: What’s the difference between a Male Enlarger and a Reducer?
A Male Enlarger connects a smaller female-threaded entry to a larger conduit, while a Reducer performs the opposite function.
Q2: Are OMEJA Male Enlargers explosion-proof?
Yes. OMEJA’s fittings comply with IEC 60079-1 and ATEX standards, suitable for Zones 1 & 2 hazardous areas.
Q3: What materials are available?
Aluminum, brass, and stainless steel options are available depending on the application environment.
Q4: Can OMEJA produce according to my drawing or sample?
Yes, OEM/ODM customization is available for industrial buyers.
Q5: What is the minimum order quantity (MOQ)?
MOQ starts at 100 pieces per size.
Q6: Do you provide export documentation?
Yes. OMEJA provides COC, test reports, packing list, and CE/IECEx certificates with every shipment.
Send Inquiry:
Contact whp@omj-casting.com with your specifications.
Get a Quotation:
Receive a detailed price list including bulk and wholesale rates.
Confirm Drawings and Thread Type:
BSP, NPT, or Metric threads can be specified.
Sample Approval:
Samples can be sent before bulk production.
Mass Production:
Manufacturing starts after sample confirmation and deposit.
Shipping:
OMEJA provides FOB, CIF, and DDP delivery options.
If you’re sourcing metal male enlargers for explosion-proof electrical systems, OMEJA CASTING stands out as one of the most professional and reliable suppliers in China. With precision casting, CNC machining, OEM customization, and factory-direct wholesale pricing, OMEJA offers the ideal combination of safety, quality, and cost efficiency.
For distributors, electrical contractors, and global importers, partnering with OMEJA ensures reliable supply and compliance with international explosion-proof standards.
Phone: +86-15243599988
Email: whp@omj-casting.com
Category: Explosion-proof Electrical Equipment » Union & Bushing
OMEJA CASTING — Your trusted manufacturer, OEM supplier, and bulk wholesaler of explosion-proof male enlargers at factory-direct prices.
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