Non Standard/ Standard Fasteners Supliers

Jiaxing Sini Fastener Co., Ltd. is one of China's established Standard Fasteners Supliers, and manufactures and exports standard and custom non-standard fasteners, established in 2004 with production facilities in Haiyan, Zhejiang and Lianyungang, Jiangsu. We supply bolts, screws, threaded rods and studs, nuts, washers and nails in carbon steel and stainless steel, in inch and metric sizes, for construction hardware, machinery, machine tools, electrical appliances and furniture applications.

Our specialization is supplying both standard fasteners that meet DIN and IFI standards and custom-engineered fasteners produced to customer drawings or samples, and our Custom Non Standard Fasteners Factory handles both routes under the same quality system. Most items are available in steel and stainless steel, with diameters and lengths covering a broad range of structural, assembly and fixing requirements. We are ISO 9001 certified and inspect products after each process, with finished-product inspection performed against customer requirements and international standards.

Our Fastener Range

We match product configuration to the application, operating limits, interfaces and acceptance criteria defined for each project.

The product range is organized into six fastener families. Each family covers standard and non-standard configurations, and we can produce to customer-specific designs and drawings where a catalog item does not match the application.

Bolts: Structural and General-Purpose Connections

Bolts cover a wide range of fasteners used for securing wood and metal structures, machinery and concrete. Product types include hexagonal bolts, heavy-duty structural bolts, round head bolts, wood screws, U-bolts and eyebolts. Available finishes include galvanized, stainless steel, hot-dip galvanized and black oxide, matching durability and corrosion-resistance requirements across different environments.

Our most competitive bolt products include carriage bolts and round head bolts. For specific projects, we also produce Timber Bolts, Carriage Bolts, Silo Bolt with Colorful Plastic Cap and Sealing Washer, Plow Bolts, Elevator bolt, Hex Bolts & Screws, Heavy Hex Bolts and A394 Hex Tower Bolts.

Screws: Construction and Assembly Fastening

Screws are widely used in construction, carpentry, metalworking and interior installation. With varying thread forms, tip designs and surface treatments, they create secure connections in wood, concrete, sheet metal and gypsum board. The series suits both structural assembly and detailed decorative work, from heavy-duty construction to interior finishing.

Our key advantage lies in corrosion-resistant construction screws. Screw diameters range from #4 to 1/2" (3.5–12 mm) and lengths from 1/2" to 60" (10–1500 mm), in steel and stainless steel.

Threaded Rods & Studs: Extended-Length Connections

Threaded rods and studs suit applications requiring extended length, fully threaded connections and high load-bearing capacity. They are commonly used in building construction, mechanical equipment, electrical installations and structural reinforcement, providing stable performance in both temporary and permanent connections.

Depending on application requirements, threaded rods and studs are available in carbon steel, alloy steel and stainless steel in a variety of grades and finishes. They are widely used in industrial, commercial and infrastructure projects where durability and stability are required.

Nuts, Washers and Nails

Nuts and washers complete bolted assemblies, providing matching threads and load distribution. Nails serve construction, woodworking and general fixing applications. These product families are supplied in steel and stainless steel, with standard and custom dimensions available.

Materials, Finishes and Specifications

Most items are available in steel and stainless steel, and can be provided in both inch and metric sizes. We manufacture products that meet DIN and IFI standards, and we also produce according to customer-specific designs and drawings.

• Materials: carbon steel, alloy steel, stainless steel
• Finishes: galvanized, hot-dip galvanized, black oxide, stainless steel
• Standards: DIN, IFI, and customer-specific designs
• Size range: bolts 3/16"–1 1/2" (5–52 mm) diameter, up to 60" (1500 mm) length; screws #4–1/2" (3.5–12 mm) diameter, up to 60" (1500 mm) length

Quality Control and Inspection

SINI FASTENER is ISO 9001 certified. We conduct inspections after each process, and for finished products we perform comprehensive inspection based on customer requirements and international standards. Our quality control equipment includes a salt spray test chamber, universal testing machine (UTM), hardness tester, video measuring system (VMS), metallographic microscope, tensile testing machine and optical emission spectrometer (OES).

These processes support verification of strength, durability and reliability before shipment. Inspection records and test reports can be prepared according to project requirements.

Custom Manufacturing and Project Support

We develop and produce products based on drawings or samples provided by customers. Our specialization lies in supplying both standard and custom-engineered bolts and screws, and we can produce according to customer-specific designs and drawings. With production facilities in Haiyan, Zhejiang and Lianyungang, Jiangsu, we serve customers across North America, South America and Europe.

Our diverse client base spans construction hardware, machinery, machine tools, electrical appliances and furniture. For custom projects, we review the drawing or sample, confirm material and finish, and prepare a proposal based on the required dimensions, quantities and delivery scope.

Information We Use to Configure Your Solution

To prepare an accurate configuration and quotation, we need the following project information:

• Product type and reference standard (DIN, IFI or custom)
• Dimensions: diameter, length, thread pitch, head type
• Material and grade (carbon steel, alloy steel, stainless steel)
• Finish requirement (galvanized, hot-dip galvanized, black oxide, etc.)
• Quantity and packaging requirements
• Application environment and corrosion exposure
• Any inspection or certification requirements

Drawings or samples are preferred for custom non-standard fasteners. We respond to inquiries within 12 hours on weekdays.

Frequently Asked Questions

What products does Jiaxing Sini Fastener supply?

We specialize in screws, bolts and nuts for wooden furniture and home applications, and also supply threaded rods and studs, washers and nails. Our range covers standard and custom non-standard fasteners in steel and stainless steel.

Can you manufacture custom non-standard fasteners?

Yes. We develop and produce products based on drawings or samples provided by customers. In addition to DIN and IFI standard products, we produce according to customer-specific designs and drawings.

What are the main applications of your fasteners?

Our fasteners are widely used in construction, woodworking, metalworking and interior installation, as well as in machinery, machine tools, electrical appliances and furniture.

How does Sini Fastener ensure product quality?

We conduct inspections after each process. For finished products, we perform comprehensive inspection based on customer requirements and international standards. Our testing equipment includes salt spray, UTM, hardness, VMS, metallographic, tensile and OES instruments.

What is your production capacity?

More than 80,000 tonnes of fasteners and hardware-related products are exported each year from our facilities in Haiyan, Zhejiang and Lianyungang, Jiangsu.

How quickly do you respond to inquiries?

We respond to inquiries within 12 hours on weekdays. For custom projects, providing drawings or samples helps us prepare an accurate proposal.