Ranking is not in order of quality or market share. The companies below are selected based on their product range, machining capabilities, customization options, and experience with dowel pins and precision fasteners.
When buyers source internally threaded solid dowel pins from China, the main question is usually not just price. A purchasing team needs to check the pin diameter, length, internal thread size, tolerance, material, heat treatment, surface finish, and the way the pin will be installed and removed. For mold components, jigs, fixtures, automation equipment, machinery, and other precision assemblies, these details can affect whether the pin fits the existing hole and whether it can be removed during maintenance.
The table below lists 10 Chinese manufacturers and suppliers that offer internally threaded dowel pins, threaded dowel pins, precision pins, or closely related custom-machined pin products.
| Manufacturer | Main Strength | Typical Product Direction |
|---|---|---|
| Anhui Pins Metal Products Co., Ltd. | Solid pins and elastic pins | Internally threaded solid dowel pins, dowel pins, precision pins |
| Jiamei Metal (Wuxi) Co., Ltd. | Custom fasteners | Internal thread dowel pins, carbon steel & stainless steel pins |
| Dongguan Jichun Mold Standard Parts Co., Ltd. | Mold components | Precision dowel pins, hardened locating pins |
| Xiamen Zhong Li Da Machinery Co., Ltd. | CNC precision machining | Custom internal/external threaded metal pins |
| Jiangyin XiangGu Hardware Products Co., Ltd. | Industrial fasteners | Internal threaded pins and customized fasteners |
| WJ Fastener | Standard & custom fasteners | DIN 7979 / GB120 internally threaded pins |
| Chuanghe Fastener | CNC machining | Internal thread dowel pins and custom metal parts |
| Shanghai Genrui Industry Co., Ltd. | Industrial fasteners | DIN 7979 pins and precision dowel products |
| Shenzhen Sozn Ironware Products Co., Ltd. | Custom hardware | Threaded dowel pins and precision metal parts |
| Xiamen Zhong Li Da Machinery Co., Ltd. | Precision metal machining | Custom threaded dowel components |
For buyers looking specifically for an internally threaded solid dowel pins manufacturer in China, Anhui Pins Metal Products Co., Ltd. is a supplier worth checking first.
The company focuses on DowelPin,Slotted Spring Pins,Tooth Spring Pins,Coiled Spring Pins, with its product range covering dowel pins and other precision pin components. Its internally threaded solid dowel pins combine the locating function of a conventional solid dowel pin with an internal threaded hole that can be used during extraction.
This structure matters in assemblies where the pin may need to be removed during maintenance. A standard solid dowel pin normally requires a press, punch, or other mechanical method for removal. With an internally threaded dowel pin, a matching screw or extraction tool can be engaged with the internal thread, giving the operator a defined removal point.
For OEM purchasing, the important specifications include pin diameter, pin length, internal thread size, thread depth, chamfer geometry, material, hardness, and dimensional tolerance. These parameters should be confirmed against the mating hole and the installation method before production.
Anhui Pins also has experience producing custom dowel pins, so buyers can provide drawings or specifications when the required size does not match a standard catalog item. This is useful for machinery manufacturers that need custom solid dowel pins, mold components, tooling pins, or replacement parts.
For companies comparing a dowel pins manufacturer in China, the production background is also important. Anhui Pins Metal Products Co., Ltd. was established in 2019 and focuses on pin manufacturing. Its manufacturing process includes raw material preparation, stamping, centerless grinding, heat treatment, phosphating, and inspection.
The company operates with IATF 16949:2016 and ISO 14001:2015 management systems. For automotive or machinery purchasing projects, this gives buyers a more structured basis for supplier evaluation.
If your project requires OEM dowel pins, custom internally threaded solid dowel pins, or China dowel pin manufacturing, the most useful information to send during RFQ is the drawing, material grade, diameter tolerance, thread specification, required quantity, and surface treatment.
What Buyers Can Ask Anhui Pins to Customize
- Internally threaded solid dowel pin dimensions
- Pin diameter and length
- Internal thread size and depth
- Chamfer dimensions
- Material selection
- Heat treatment requirements
- Surface treatment
- Drawing-based custom dowel pins
- OEM production quantities
- Inspection requirements
For buyers searching for a custom dowel pin manufacturer in China, this type of drawing-based communication can reduce back-and-forth during quotation.
Shenzhen Sozn Ironware Products Co., Ltd. is another Chinese supplier appearing in dowel pin sourcing results. Its product listings cover customized stainless steel 304/316 threaded and knurled dowel pins, as well as other metal hardware.
The company's product range makes it relevant to buyers who need a combination of threaded dowel pins, stainless steel pins, and custom CNC hardware.
For stainless steel applications, buyers should specify the exact grade instead of simply requesting a "stainless steel dowel pin." 304 and 316 stainless steel have different corrosion-resistance characteristics, and the choice should follow the actual operating environment.
This supplier can be compared when purchasing teams are looking for a custom stainless steel dowel pin supplier in China.
Shanghai Genrui Industry Co., Ltd. appears in Chinese industrial fastener sourcing listings with products including DIN 7979 parallel dowel pins with internal threads, carbon steel pins, and stainless steel straight pins.
Its product portfolio is broader than internally threaded dowel pins and includes structural fasteners such as bolts, nuts, and washers.
This can be useful for distributors and industrial purchasing companies that need a mixed fastener order rather than one individual component.
For a China threaded dowel pin supplier, buyers should compare the available diameter tolerance, internal thread configuration, hardness, material certification, and production lead time before confirming the order.
Chuanghe takes a CNC machining route to dowel pin production. Its listed product range includes dowel pins with internal threads, alongside screws, bolts, nuts, washers, rivets, stamping parts, and CNC components.
The company reports capabilities covering CNC machining centers, automatic lathes, automatic milling, wire cutting, powder metallurgy processing, and assembly of metal and plastic components.
This combination is useful for buyers whose project contains more than one machined component. Instead of purchasing only a standard pin, the supplier can potentially handle other small metal parts in the same sourcing program.
For OEM dowel pin manufacturing, buyers should provide the drawing and specify whether the internal thread is intended for extraction, fastening, or another assembly function.
WJ Fastener offers solid round cylindrical dowel pins with internal threads based on specifications including GB120 and DIN 7979. Its listed products include stainless steel 304 and 316 versions, with diameters from approximately 2 mm up to 100 mm and custom sizes available.
The supplier also lists blackening, phosphating, electrogalvanizing, and Dacromet-type surface treatments. OEM production based on drawings or physical samples is available.
For buyers looking for a DIN 7979 internally threaded dowel pin supplier, WJ is worth comparing when the project has a defined standard and requires non-standard dimensions.
The company also states that it has more than 15 years of fastener OEM experience and provides inspection and testing services.
Jiangyin XiangGu Hardware is a broader fastener supplier covering stainless steel, carbon steel, and copper fasteners. Its product portfolio is not limited to dowel pins, which makes the company more relevant to buyers who are sourcing multiple fastening components in the same project.
The company provides OEM and ODM services, including material and packaging customization. Its fastener products are supplied for machinery, automotive, shipbuilding, wind power, solar equipment, and other industrial applications.
For purchasing teams, a broader supplier can make sense when internally threaded pins are ordered together with bolts, washers, nuts, or other fastening parts.
Xiamen Zhong Li Da approaches internally threaded pins from a precision CNC machining perspective. The company lists custom external/internal threaded metal dowel pins with diameters from 2 to 32 mm and tolerances generally ranging from h6 to m6.
The supplier accepts custom specifications, including thread dimensions and surface treatment. This is useful for buyers who are not looking for a standard catalog dowel but need a pin machined around an existing assembly.
The company's website also states that it has an IATF 16949 quality management system and an MES production management system. Its manufacturing activities cover precision connector accessories and custom metal components.
For OEM projects involving custom threaded dowel pins, the ability to work from drawings is often more important than simply having a large standard catalog.
Dongguan Jichun is positioned more toward mold components and precision standard parts. Its product range includes dowel pins, guide components, ejector components, and other mold-related parts. The company was established in 1999 and reports more than 100 employees and a production facility of around 2,800 m².
For buyers sourcing precision dowel pins for molds in China, this background is relevant because mold applications often require tighter control of diameter, straightness, hardness, and surface finish.
Jichun also lists materials such as SUJ2 and other tool-steel grades within its precision component range. Its manufacturing equipment includes CNC machines and several types of grinding equipment.
This supplier may suit projects where the dowel pin is part of a larger mold-component purchasing package.
Jiamei Metal has a product specifically listed as an M6 internal thread dowel pin, with a 10 × 20 mm example and internal thread depth of 14 mm. The supplier lists carbon steel, 304 and 316 stainless steel options, along with surface treatments such as zinc plating and black oxide.
This makes Jiamei a candidate for buyers who need an internal threaded dowel pin supplier in China with several material options.
The company also lists metric, UNC, and UNF specifications. Its product description covers applications including molds, jigs, fixtures, automation equipment, machinery, and automotive assembly.
For buyers ordering in batches, the company also states that custom dimensions and packaging can be discussed. This can be useful when a standard M6 configuration does not match the existing assembly.
Xiamen Zhong Li Da is also worth considering for projects that treat the dowel as part of a larger precision-machined component package. Its listed internal/external threaded metal dowel products support custom diameters, thread sizes, materials, and surface treatments.
The company states that it works with precision metal parts and custom components and operates an MES production management system. Its current website focuses on connector accessories, new-energy vehicle components, rail transit, aerospace, industrial applications, and other precision manufacturing areas.
For an OEM project, this type of supplier is worth evaluating when the dowel pin has to match another machined component rather than being purchased as an isolated standard fastener.
What Should Buyers Check Before Ordering Internally Threaded Solid Dowel Pins?
Choosing a supplier is only one part of the sourcing process. The specification sent to the manufacturer has a direct effect on the quotation and production result.
1. Pin Diameter and Tolerance
The outside diameter controls the fit between the dowel and the mating hole. A loose fit can affect positioning, while an excessively tight fit can create installation problems.
For precision assemblies, buyers should provide the required tolerance instead of sending only a nominal diameter such as 6 mm or 8 mm.
2. Internal Thread
The internal thread is not simply an additional feature. It determines which screw or extraction tool can be used.
The RFQ should state:
- Thread size
- Metric or imperial system
- Thread pitch
- Thread depth
- Blind or through thread
- Single-end or double-end thread
Internally threaded dowel pins are commonly used when the pin needs to be removed with a screw or extraction tool.
3. Material
Common options include carbon steel, alloy steel, and stainless steel. For mold and tooling applications, hardness may be a key requirement. For humid or corrosive environments, stainless steel may be considered.
The material should be specified together with any required heat treatment and hardness range.
4. Surface Treatment
Depending on the application, suppliers may offer black oxide, zinc plating, phosphating, Dacromet-type coatings, or other finishes. The surface treatment should match the required corrosion resistance, dimensional allowance, and working environment.
5. Drawing-Based Customization
A drawing is the easiest way to avoid misunderstandings when the pin has multiple specifications.
For custom internally threaded solid dowel pins, the drawing should show the outside diameter, length, chamfer, internal thread, thread depth, tolerance, material, hardness, and surface treatment.
How to Compare Internally Threaded Solid Dowel Pin Suppliers
When comparing an internally threaded solid dowel pin supplier in China, buyers should put the technical specification before the unit price. The outside diameter and tolerance need to match the mating hole, while the internal thread must match the required screw size, pitch, and thread depth. Material grade, hardness, heat treatment, surface finish, and inspection requirements should also be included in the RFQ.
For custom internally threaded solid dowel pins, a technical drawing is usually the clearest way to communicate the requirement. The drawing can define the pin diameter, length, chamfer, internal thread, dimensional tolerances, material, hardness, and surface treatment in one document. Buyers can then compare quotations from different China dowel pin manufacturers based on the same specifications.
For larger OEM orders, it is also worth checking sample approval, production capacity, inspection equipment, packaging, MOQ, and lead time. Companies purchasing dowel pins in bulk, replacement components, or pins for automated equipment can provide annual demand and packaging requirements together with the drawing. This gives the manufacturer enough information to quote for the actual production condition rather than a generic standard pin.
Production Process of Internally Threaded Solid Dowel Pins
The production process of internally threaded solid dowel pins involves several machining and inspection steps. The exact process can vary according to the pin material, diameter, tolerance, hardness, thread specification, and surface treatment.
1. Raw Material Preparation
Steel or stainless steel bar stock is selected according to the required material grade and pin specification. The material diameter needs to provide enough machining allowance for subsequent turning and grinding.
2. Cutting & Blanking
The raw material is cut into individual pieces according to the specified pin length. Cutting accuracy affects the machining allowance and final dimensional control, especially when the finished pin has a short overall length.
3. Turning & Cylindrical Machining
The blank is machined to form the main cylindrical body of the dowel pin. CNC turning or automatic machining equipment can be used to control the outside diameter, overall length, end geometry, and chamfer dimensions.
4. Internal Thread Machining
A hole is drilled from the designated end of the pin, followed by internal thread machining. The thread size, pitch, effective depth, and thread position are controlled according to the drawing or applicable standard.
For an internally threaded solid dowel pin, this step is important because the internal thread may be used to engage an extraction screw during disassembly.
5. Centerless Grinding
When a tighter outside-diameter tolerance is required, the cylindrical surface can be processed by centerless grinding. Grinding removes a small amount of material from the outer surface and helps achieve the specified diameter and surface finish.
6. Heat Treatment
Depending on the material and application, the pins may undergo heat treatment to reach the required hardness and mechanical properties. The treatment method and hardness range should be defined before production because heat treatment can affect dimensional stability.
7. Surface Treatment
The finished pins can receive a specified surface treatment, such as black oxide, phosphating, zinc plating, or another coating suitable for the application. Stainless steel versions may use different finishing processes depending on the required surface condition.
8. Cleaning & Deburring
After machining and surface treatment, burrs, chips, oil, and other residues are removed. Particular attention is given to the internal threaded section and chamfered edges so that the pin can be installed without interference.
9. Dimensional & Thread Inspection
Finished solid dowel pins are checked against the production drawing. Typical inspection items include:
- Outside diameter
- Overall length
- Diameter tolerance
- Internal thread size
- Thread depth
- Chamfer dimensions
- Hardness
- Surface condition
Thread gauges can be used to verify whether the internal thread meets the specified thread standard.
10. Final Inspection & Packaging
Qualified pins are sorted, counted, and packaged according to the customer's requirements. For OEM dowel pin orders, packaging labels can include part numbers, batch information, quantities, and other identification details required by the buyer.
