Our comprehensive product portfolio includes a wide range of brass rods (including low-lead and lead-free grades), brass fittings, and pipe components, engineered for exceptional mechanical strength, corrosion resistance, and machinability across plumbing, HVAC, automotive, and industrial applications.
The Brass Hex Socket Double Male Thread Adapter, also known as a brass double male hex nipple or internal hex double male connector, is a specialized threaded fitting designed for connecting two female-threaded components in pipeline systems.
The product features a double male thread structure, allowing direct connection with female-threaded pipes, valves, and fittings. The internal hex socket located at the center enables tightening and removal with an Allen wrench, providing significant advantages in confined installation spaces.
NINGXING manufactures these adapters using high-quality brass materials and advanced machining technology. The precise thread design ensures stable connection performance, while the brass body provides excellent resistance against corrosion, oxidation, and mechanical stress.
This product is widely applied in water supply systems, industrial fluid transportation, HVAC equipment, refrigeration systems, gas pipelines, mechanical equipment, and automation machinery.

| Item | Specification |
|---|---|
| Product Name | Brass Hex Socket Double Male Thread Adapter |
| Brand | NINGXING |
| Material | C3604 Brass / H59 Brass / Customized Brass |
| Structure | Double Male Thread + Internal Hex Socket |
| Thread Standard | BSP, BSPT, NPT, NPTF, R(PT), Metric |
| Size Range | 1/4" - 4" (DN8-DN100) |
| Working Pressure | 1.6MPa - 6.9MPa |
| Working Temperature | -50℃ to 150℃ |
| Surface Treatment | Natural Brass, Nickel Plating, Chrome Plating |
| Manufacturing Process | Forging + CNC Machining |
| Certification | GB/T 11618, RoHS, ISO9001 Available |
The double male thread design allows the adapter to connect two female-threaded components directly, reducing the need for additional connection parts during installation. This structure simplifies pipeline assembly and helps contractors improve installation efficiency.
NINGXING uses precision machining technology to ensure that each thread has accurate dimensions and a consistent profile. This improves compatibility with different pipe fittings and reduces problems caused by improper thread matching, such as leakage or loose connections.
The adapter supports multiple international thread standards, including BSP, BSPT, NPT, and metric threads, allowing global buyers to select suitable solutions according to their regional requirements.
The internal hex socket is the key feature that differentiates this product from ordinary double male adapters.
In many industrial applications, pipeline components are installed inside equipment frames, behind panels, or in narrow spaces where conventional wrenches cannot operate effectively. The internal hex socket allows technicians to tighten or remove the adapter using a standard Allen wrench, significantly improving installation convenience.
For equipment manufacturers and maintenance teams, this design reduces installation difficulty, shortens maintenance time, and improves overall operational efficiency.
Material quality directly affects the service life of pipe fittings. NINGXING Brass Hex Socket Double Male Thread Adapter uses high-quality C3604 easy-machining brass or H59 brass to ensure stable performance under different working conditions.
The brass material provides excellent corrosion resistance, good mechanical strength, and reliable pressure resistance. Compared with ordinary low-cost fittings, high-quality brass adapters maintain better structural stability during long-term use in humid, high-temperature, or industrial environments.
NINGXING applies advanced CNC machining equipment throughout the production process to control thread accuracy, hex socket dimensions, and overall product consistency.
Every batch is manufactured according to strict production standards. From raw material inspection to finished product testing, each stage is carefully controlled to ensure stable quality for distributors and engineering projects.
The precise machining process helps achieve smooth installation, accurate connection, and reliable sealing performance.
Before production, all brass raw materials undergo inspection to ensure compliance with quality requirements. The selected materials provide excellent machining performance and long-term durability.
For applications requiring enhanced corrosion protection, NINGXING offers nickel plating and chrome plating surface treatments. These processes improve oxidation resistance and surface durability, making the adapters suitable for outdoor environments, humid conditions, and industrial applications.
Different industries often require customized connection solutions. NINGXING provides professional OEM and ODM services to meet special project requirements.
Customers can customize product dimensions, thread specifications, materials, surface treatments, and packaging solutions according to their applications. From engineering confirmation to mass production, NINGXING works closely with customers to ensure accurate product matching.
For engineering companies and equipment manufacturers, installation space is often a major challenge. Traditional adapters may require additional operating space for external tools, increasing installation difficulty.
NINGXING hex socket adapters solve this problem through a compact internal hex structure, allowing easier installation in restricted areas and improving project efficiency.
Pipeline leakage and frequent replacement can increase maintenance costs. NINGXING focuses on thread accuracy, material quality, and sealing performance to provide stable connection solutions.
The combination of premium brass materials and precision machining helps reduce leakage risks and supports long-term operation in demanding environments.
For international buyers, supplier flexibility is an important factor. NINGXING supports different thread standards, customized designs, and bulk production requirements.
Whether customers need standard inventory products or special engineering components, NINGXING provides reliable manufacturing support and competitive supply capability.
| Comparison Item | NINGXING Hex Socket Double Male Thread Adapter | Ordinary Double Male Adapter |
|---|---|---|
| Installation Method | Internal hex socket installation with Allen wrench | Requires external wrench operation |
| Space Requirement | Suitable for narrow and compact installation areas | Requires larger operation space |
| Design Structure | Double male thread with integrated hex socket | Standard double male thread design |
| Installation Efficiency | Faster installation in difficult locations | More difficult in restricted spaces |
In industrial environments such as petrochemical plants, manufacturing facilities, and mechanical equipment systems, pipeline installation space is often limited. Traditional connectors may not provide enough operating clearance for installation tools.
A petrochemical company needed a compact connector solution for a cooling water pipeline installed inside a restricted equipment area. NINGXING supplied customized Brass Hex Socket Double Male Thread Adapters with suitable thread specifications.
The internal hex socket design allowed technicians to complete installation without additional operating space. After installation, the system achieved improved connection efficiency and maintained stable operation without leakage during continuous use.
Modern industrial machinery requires reliable pipeline connections under high temperature and pressure conditions. Poor-quality fittings may lead to leakage, maintenance downtime, and increased operating costs.
A plastic injection molding equipment manufacturer experienced repeated connection failures in its cooling system. NINGXING recommended brass adapters with nickel-plated surface treatment to improve corrosion resistance and durability.
Commercial buildings often contain complex HVAC and water pipeline layouts where installation space is limited.
During a large building HVAC project, contractors selected NINGXING Brass Hex Socket Double Male Thread Adapters because of their compact structure, reliable sealing performance, and multiple available specifications.
The adapters helped simplify installation procedures and improved construction efficiency during the project.
| Size | Thread Standard | Material | Pressure Rating | Temperature Range |
|---|---|---|---|---|
| 1/4" | BSP/NPT | C3604/H59 Brass | ≤6.9MPa | -50℃~150℃ |
| 3/8" | BSP/NPT | C3604/H59 Brass | ≤6.9MPa | -50℃~150℃ |
| 1/2" | BSP/NPT/R | Brass | ≤6.9MPa | -50℃~150℃ |
| 3/4" | BSP/NPT/R | Brass | ≤6.9MPa | -50℃~150℃ |
| 1" | BSP/NPT/R | Brass | ≤6.9MPa | -50℃~150℃ |
| DN15-DN100 | Customized Available | Brass | Customized | Customized |
The above specifications are reference values. NINGXING supports customized dimensions, thread standards, and materials according to customer requirements.
This product is widely used in industrial pipelines, HVAC systems, refrigeration equipment, mechanical equipment, water supply systems, and other fluid connection applications. It is suitable for compatible media including water, oil, air, gas, and other noncorrosive fluids.
The internal hex socket allows installation using an Allen wrench instead of traditional external tools. This makes the adapter especially suitable for narrow spaces, compact equipment structures, and locations where tool access is limited.
Yes. NINGXING supports OEM and ODM customization, including special dimensions, thread types, materials, surface treatments, and packaging requirements. Customers can provide drawings or samples, and our technical team can assist with product development.
NINGXING supports BSP, BSPT, NPT, NPTF, R(PT), and metric thread standards to meet different international market requirements.
Brass has natural corrosion resistance and performs well in most water and industrial environments. For outdoor or high-humidity applications, nickel-plated or chrome-plated options are recommended for enhanced protection.
Under normal operating conditions and correct installation, NINGXING Brass Hex Socket Double Male Thread Adapter can provide long-term reliable performance, with a designed service life of more than 10 years.
With advanced CNC machining technology, strict quality management, premium brass materials, and flexible customization capability, NINGXING Brass Hex Socket Double Male Thread Adapter provides reliable connection solutions for global industrial and commercial applications.
For distributors, engineering contractors, and equipment manufacturers seeking stable quality, competitive factory supply, and customized solutions, NINGXING delivers dependable brass fitting products designed for long-term performance.
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No. 478, Daijia North Road, Industrial Zone, Changhe Town, Cixi City, Zhejiang Province, China
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