Custom High-Strength Extra-Coarse Double-Thread Screws — Manufactured by Hetai
Hetai specializes in the custom manufacturing of non-standard fasteners, providing precision-engineered High-Strength Extra-Coarse Double-Thread Screws for applications requiring fast installation, strong fastening performance, and customized thread configurations.
Designed with a double-start thread and extra-coarse pitch, these screws can achieve greater axial movement per revolution than conventional single-start screws. Their specialized thread geometry makes them suitable for applications where installation efficiency and reliable mechanical fastening are important.
What Are High-Strength Extra-Coarse Double-Thread Screws?
High-strength extra-coarse double-thread screws feature two independent thread starts and a relatively large thread pitch. The double-thread design allows the screw to advance farther with each complete rotation, helping reduce installation time.
The extra-coarse thread profile can also provide a robust thread structure and is suitable for applications involving repeated assembly or demanding fastening conditions.
As a custom fastener, the screw’s diameter, length, thread pitch, thread form, head style, drive type, and end configuration can all be manufactured according to customer requirements.
Custom Manufacturing by Hetai
Hetai manufactures specialized screws based on:
- 2D engineering drawings
- 3D CAD models
- Physical samples
- Specific thread requirements
- Required strength grade
- Dimensional tolerances
- Surface treatment requirements
- Application conditions
Our engineering team can evaluate the screw design and recommend a suitable combination of cold heading, CNC machining, thread rolling, and secondary machining according to the product structure and production volume.
High-Strength Materials
For demanding applications, the screws can be manufactured from high-strength materials such as:
- Alloy Steel
- Carbon Steel
- Stainless Steel
- Other specified steel grades
Heat treatment can be applied when required to achieve the specified hardness and mechanical properties.
Material and strength requirements can be customized according to the customer’s technical specifications.
Double-Start Extra-Coarse Thread
The defining feature of this screw is its double-start, extra-coarse thread.
Compared with a conventional single-start thread, a double-start thread has two thread helices beginning at different positions around the screw. This allows a greater lead per revolution, enabling faster axial movement during installation.
The thread can be customized in terms of:
- Nominal diameter
- Thread pitch
- Thread lead
- Thread length
- Thread tolerance
- Thread profile
- Partial or full thread
- Right-hand or specified thread direction
For specialized applications, Hetai can manufacture thread dimensions according to customer drawings rather than relying solely on standard specifications.
Precision Thread Rolling
Where the design and material are suitable, thread rolling can be used to manufacture the external thread.
Thread rolling forms the thread through plastic deformation rather than cutting it away. This can provide excellent thread consistency and efficient production for high-volume orders.
For complex or special thread configurations, CNC machining and other secondary processes can be combined with thread processing.
Customized Screw Head Designs
The screw head can also be customized to suit different installation methods, including:
- Hex Head
- Socket Head
- Pan Head
- Flat Head
- Button Head
- Special-Shaped Heads
Drive features such as hex sockets, slots, or other custom configurations can be manufactured according to drawings.
Surface Finishes
Hetai can provide a variety of surface treatments according to the application:
- Zinc Plating
- Nickel Plating
- Chrome Plating
- Electrophoretic Coating
- Black Oxide
- Baking Paint
- Other Customized Finishes
Surface treatment can be selected based on corrosion resistance, appearance, wear resistance, and operating environment.
Applications
Custom high-strength extra-coarse double-thread screws can be developed for:
- Heavy Machinery
- Industrial Equipment
- Automation Equipment
- Automotive Components
- Construction Equipment
- Metal Structures
- Mechanical Assemblies
- Specialized Industrial Applications
They are particularly suitable for applications where fast installation, high-strength fastening, and a specialized thread design are required.
Quality Control
Hetai performs quality inspection throughout the manufacturing process to ensure that customized screws meet the required specifications.
Inspection can include:
- Overall dimensions
- Thread diameter
- Thread pitch and lead
- Thread fit
- Head dimensions
- Length
- Hardness
- Surface finish
- Appearance
Critical dimensions and tolerances can be controlled according to customer drawings and inspection requirements.
Why Choose Hetai?
With experience in custom fasteners and non-standard components, Hetai provides integrated manufacturing capabilities for specialized screw designs.
From engineering review and material selection to forming, CNC machining, thread rolling, surface treatment, quality inspection, and packaging, Hetai provides a complete custom manufacturing solution.
Custom Double-Thread Screws Made to Your Specifications
If you require High-Strength Extra-Coarse Double-Thread Screws, send Hetai your drawings, 3D models, or samples. We can manufacture customized screws based on your required dimensions, thread geometry, material, strength, surface treatment, and production volume.
Hetai — Custom Fasteners. Precision Manufacturing. Reliable Quality.
