What products does Youlong manufacture?

Youlong manufactures photovoltaic mounting components such as aluminum guide rails, water channels, angle brackets and connectors, plus precision fasteners including anchor bolts, carriage bolts, expansion bolts, flat washers and wing nuts for solar, wind power and construction projects.

Can you produce custom PV brackets and fasteners to my drawings?

Yes. Our automated stamping, forging and CNC machining lines support OEM and custom production. Send drawings or samples with material, finish and quantity requirements, and our engineers will confirm feasibility, tolerances and a written proposal.

How do you control the quality of fasteners for outdoor solar projects?

We run random inspections from raw material intake to final dispatch and test against industry standards, including salt spray corrosion testing and tensile strength testing, so that hardware performs reliably in long-term outdoor exposure.

Which material should I choose for coastal or high-humidity PV sites?

For coastal, offshore or industrial sites with high corrosion categories, stainless steel grade 316 (A4) fasteners are generally recommended. For inland sites, 304 (A2) stainless or hot-dip galvanized carbon steel is commonly specified. Isolating washers help prevent galvanic corrosion between aluminum rails and steel hardware.

Where is Youlong located and do you export worldwide?

Youlong is located in Yongnian District, Handan City, Hebei Province, known as China's Fastener Capital. We have served more than 100 clients worldwide with cumulative shipments exceeding 300,000 tonnes.

Best Stainless Steel Expansion Bolt Manufacturer, Manufacturers

1 / 3

Best Stainless Steel Expansion Bolt Manufacturer, Manufacturers

Heavy-duty stainless steel expansion bolt with sleeve type structure, featuring strong gripping force, anti-loosening and superior corrosion resistance. Made of 304/316 stainless steel, suitable for concrete, brick wall and solid base fixing, ensuring stable and reliable fastening for construction, hardware and outdoor installation projects.

Send Inquiry

Product Description

Product Application

Widely used in construction engineering, hardware installation, curtain wall fixing, pipeline support, outdoor shelf installation and mechanical equipment fixing scenarios, suitable for solid concrete, brick wall, stone and other hard bases.

Applied for permanent fastening of various brackets, hangers, metal components, furniture accessories and outdoor facilities, providing stable and durable fixing support for heavy objects and structural parts.

Compatible with various installation tools and construction scenarios, suitable for indoor and outdoor hard base fastening, especially for environments with high anti-corrosion and anti-rust requirements.

Ideal for coastal areas, humid workshops, outdoor engineering and other harsh environments, avoiding rust failure and ensuring long-term fastening safety.

Suitable for engineering renovation, equipment installation, maintenance and other scenarios, easy to operate and strong in adaptability, meeting diverse heavy-duty fixing demands.

Material & Processing Features

Manufactured from high-grade 304 or 316 stainless steel, with excellent rust resistance, salt spray resistance and chemical corrosion resistance, suitable for long-term use in harsh environments.

Adopts precision cold heading and machining process, with smooth thread, uniform sleeve thickness and strict dimensional tolerance, ensuring tight fitting and stable expansion effect.

Integrated expansion sleeve design, uniform stress during expansion, strong gripping force with the base, not easy to slip or loosen under vibration and load.

Hexagon head design fits standard wrenches, labor-saving installation, high hardness and not easy to deform, ensuring stable operation during construction.

Surface passivation treatment improves wear resistance and corrosion resistance, prolonging service life and keeping stable performance in long-term use.

Core Product Benefits

Strong expansion gripping force, tightly combined with the solid base, high bearing capacity, effectively preventing falling off and loosening, ensuring construction safety.

High-quality stainless steel material avoids rust and corrosion problems, solving the hidden danger of fastener failure in harsh environments, reducing later maintenance costs.

Simple installation process, no complex auxiliary tools required, suitable for on-site construction, improving installation efficiency and shortening construction period.

Complete specifications with various diameters and lengths, supporting customized processing to meet different installation depths and load-bearing requirements.

Comply with international fastener standards, passing tensile test, hardness test and salt spray test, with stable quality and reliable performance.

Wide applicability, strong compatibility and reusable performance, cost-effective, making it a preferred heavy-duty fastening fastener for construction and outdoor projects.

Detail Pictures

Frequently Asked Questions (FAQ)

Q1: What materials are available for these expansion bolts?

These expansion bolts are manufactured from high-grade 304 or 316 stainless steel, offering outstanding rust prevention, salt spray endurance, and corrosion resistance for tough environmental conditions.

Q2: Which base materials are suitable for installation?

They are engineered for solid and hard base materials, including concrete, solid brick walls, stone, and other structurally sound substrates.

Q3: Can these bolts be used in coastal and marine environments?

Yes, the 316 and 304 stainless steel construction along with passivation treatment make them ideal for outdoor engineering, humid settings, and coastal areas requiring robust corrosion defense.

Q4: Are specialized installation tools required?

No specialized or complicated tools are required. The hexagon head design allows for convenient and labor-saving tightening using standard standard wrenches.

Q5: Can customized sizes and specifications be supplied?

Yes, full specifications with various diameters and lengths are available, and customized manufacturing is supported to meet specific depth and load-bearing requirements.