Full spectrum of industrial fastening solutions | Covering both standard and custom parts
Round Head Nip Bolts are high-strength fastening components designed for secure assembly in machinery, equipment, metal structures, automotive parts, and customized industrial applications. With a rounded head design and a threaded shank, these bolts provide reliable clamping force while offering a neat and compact appearance after installation.
This product is available in M3, M4, and customized sizes, with material options including stainless steel, alloy steel, and carbon steel. The black surface finish provides a professional appearance and can offer improved surface protection depending on the selected treatment, such as black oxide, black zinc, or black phosphating.
These bolts are suitable for OEM and ODM production and can be customized according to drawings, samples, or specific project requirements.
| Feature | Description |
|---|---|
| Product Name | Round Head Nip Bolt |
| Size Range | M3, M4, or customized |
| Material Options | Stainless Steel, Alloy Steel, Carbon Steel |
| Head Type | Round Head |
| Thread Type | Metric Thread |
| Surface Finish | Black Finish / Black Oxide / Black Zinc / Black Phosphate |
| Strength | Standard or High Strength Available |
| Application | Machinery, equipment, automotive, metal assembly, custom fastening |
| Customization | Size, material, grade, finish, thread length, packaging |
The round head provides a smooth and finished appearance after installation. It is suitable for applications where the bolt head may remain visible and where a clean assembly look is required.
Available in alloy steel or high-strength carbon steel, these bolts can provide excellent mechanical performance for demanding fastening applications.
Different materials can be selected according to the working environment:
| Material | Main Advantage |
|---|---|
| Stainless Steel | Better corrosion resistance |
| Alloy Steel | Higher strength and durability |
| Carbon Steel | Cost-effective for general use |
The black surface finish gives the bolt a professional industrial appearance. Depending on customer requirements, the finish can be made as black oxide, black zinc plating, or black phosphating.
| Surface Treatment | Appearance | Typical Use |
|---|---|---|
| Black Oxide | Dark black, thin coating | Machinery, tools, indoor use |
| Black Zinc Plated | Black glossy coating | Better corrosion resistance than black oxide |
| Black Phosphate | Matte black / dark gray | Automotive, machinery, anti-rust oil treatment |
| Plain Black | Natural dark surface | General industrial use |
| Item | Specification |
|---|---|
| Product Type | Round Head Nip Bolt |
| Available Sizes | M3, M4, customized sizes |
| Material | Stainless Steel / Alloy Steel / Carbon Steel |
| Grade | Standard grade or high strength grade |
| Head Style | Round Head |
| Thread | Metric Thread |
| Finish | Black Finish / Customized Finish |
| Production Standard | Standard or customized according to drawing |
| Packing | Bulk bag, carton, small box, pallet, or custom packaging |
| Service | OEM / ODM Available |
Round head nip bolts are widely used in industrial and commercial assembly.
| Application Area | Usage |
|---|---|
| Machinery Assembly | Equipment fastening and mechanical connection |
| Automotive Parts | Vehicle components and accessory assembly |
| Metal Fabrication | Metal frame, bracket, and structural fixing |
| Electrical Equipment | Cabinet, panel, and device assembly |
| Furniture & Hardware | Customized hardware connection |
| OEM Projects | Customized fastener production according to drawings |
We can support different customized requirements for importers, wholesalers, distributors, and project buyers.
| Custom Item | Available Options |
|---|---|
| Diameter | M3, M4, M5, M6, or custom |
| Length | Standard or customized length |
| Material | Stainless steel, alloy steel, carbon steel |
| Surface Finish | Black oxide, zinc plated, nickel plated, hot dip galvanized, plain |
| Head Type | Round head or customized head shape |
| Thread | Full thread, partial thread, special thread |
| Packing | Neutral packing, customer logo packing, carton, pallet |
We supply high-quality fastening products for global B2B customers, including distributors, hardware wholesalers, machinery factories, construction suppliers, and OEM manufacturers.
Our advantages include:
| Advantage | Details |
|---|---|
| OEM/ODM Support | Production according to drawings or samples |
| Multiple Materials | Stainless steel, alloy steel, carbon steel available |
| Flexible Surface Treatment | Black finish, zinc plated, hot dip galvanized, and more |
| Stable Quality | Strict inspection for size, thread, and appearance |
| Export Packaging | Suitable for long-distance international shipping |
| Fast Communication | Professional foreign trade service support |
A round head nip bolt is a fastening component with a rounded head and threaded shank. It is commonly used for machinery, equipment, metal parts, and customized assembly applications.
Common sizes include M3 and M4, and we can also produce other sizes according to customer requirements.
We can supply stainless steel, alloy steel, and carbon steel according to the required strength and working environment.
Yes. High-strength grades can be supplied, especially when using alloy steel or high-strength carbon steel.
The black finish can be customized as black oxide, black zinc plating, black phosphating, or plain black finish. The exact treatment depends on the customer’s application and corrosion resistance requirement.
Yes. We support OEM and ODM production. Customers can provide drawings, samples, dimensions, material requirements, and surface treatment requirements.
It depends on the application. Stainless steel offers better corrosion resistance, while alloy steel usually provides higher strength.
Yes. Samples can be provided for size checking, quality confirmation, and surface finish approval before mass production.
We can provide bulk packing, small box packing, carton packing, pallet packing, or customized packaging with customer labels.
For an accurate quotation, please provide size, length, material, grade, surface treatment, quantity, packaging requirement, and destination port or delivery address.
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Complies with major global standards such as ISO/DIN/GB/ANSI/JIS
Standard parts + customized parts, one-stop solution for all your fastening needs
Tolerance control far exceeds industry standards, ranging from 4.8 to 12.9 grades.
Customization based on provided drawings/samples/working conditions; rapid prototyping and mass production delivery.
Trusted by global manufacturers for fastener solutions
International Organization for Standardization (ISO) standards
German Industrial Standards
Chinese National Standards
American National Standards
Japanese Industrial Standards
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