Screws for Every Assembly Line: Our Product Range
Anhui Linghong Hardware Technology Co., Ltd. is a professional Heavy Duty Metal Screws Products manufacturer and supplier based in China, with over 20 years of fastener experience. We produce a full spectrum of screws—wood, self-tapping, drywall, self-drilling, and collated—designed for construction, furniture, roofing, and industrial fastening. Our factory, spanning 12,600 m² with 80+ production lines, delivers a stable monthly capacity of 500 tons, ensuring consistent supply for large-scale projects.
We position ourselves as a one-stop partner for OEM and ODM screw requirements. From material selection to surface treatment and packaging, we control every step in-house, backed by ISO 9001, ISO 14001, and ISO 45001 certifications. Whether you need standard fasteners or custom-engineered solutions, our team configures each order to your specific application and performance targets.
Our Product Families and Their Applications
Each screw category serves a distinct fastening challenge. Below is a breakdown of our range and where each type fits best in your operations.
| Category |
Typical Applications |
Key Features |
| Wood Screw |
Furniture assembly, timber structures, joinery |
Sharp point, deep threads, anti-splitting design |
| Self Tapping Screw |
Metal-to-metal, plastic, and composite materials |
Taps its own thread, high hardness, no pre-tapping |
| Drywall Screws |
Gypsum board, lightweight partitions, ceilings |
Bugle head, fine threads, phosphate or zinc finish |
| Self-drilling Screws |
Steel framing, metal roofing, HVAC ductwork |
Drill point eliminates pre-drilling, saves labor |
| Collated Screws |
High-volume production lines, automated screwdrivers |
Strip-fed for rapid installation, consistent feed |
Material and Finish Options
We offer screws in carbon steel (e.g., 1022A) and stainless steel (304 A2, 316 A4). Carbon steel screws undergo carburizing heat treatment for surface hardness and core toughness. For corrosion resistance, we provide yellow zinc plating, mechanical zinc plating (hydrogen-embrittlement-free), and Ruspert eco-friendly coatings. Stainless steel grades offer natural rust protection, with 316 providing superior saltwater resistance.
Our material selection guidance is based on your substrate, environmental exposure, and required lifespan. For outdoor or coastal applications, we recommend stainless steel or Ruspert-coated carbon steel. For indoor furniture, yellow zinc or plain finish suffices.
Engineering and Customization
We understand that off-the-shelf screws rarely fit every project. Our engineering team works with you to customize head styles (bugle, hex, countersunk, pan, wafer, button), drive types (Phillips, Torx, square), thread patterns (coarse, fine, twin-fast, hi-lo), and point styles (sharp, type 17, drill point). We also accommodate special lengths, diameters, and rib configurations for enhanced pull-out resistance.
For collated screws, we design the strip to match your auto-feed screwdriver, ensuring smooth feeding and minimal jams. We provide samples for validation before mass production.
Quality Assurance and Testing
Quality is embedded in our process. Our lab is equipped with metallographic polishing machines and Rockwell hardness testers. We perform first-piece inspection, in-process patrols, and final ex-factory checks on every batch. This ensures dimensional accuracy, hardness consistency, and coating integrity.
We also conduct salt spray tests for corrosion resistance and torque tests for driveability. Our ISO 9001 quality management system governs all procedures, and we provide material certificates and test reports upon request.
Production Capacity and Lead Times
With over 80 sets of production equipment, we maintain a stable monthly output of approximately 500 tons. Our export experience—shipping 40-50 containers to Australia and 10 to Europe/Japan monthly—ensures we handle large-volume orders efficiently. Typical lead times are 20-30 days after sample approval, depending on order size and complexity.
We operate a "intelligent and mechanized production as the mainstay" model, balancing speed with precision. Our packaging system is designed for export, with options for bulk cartons, retail-ready boxes, or custom labeling.
Installation and Maintenance Support
We provide technical guidance on screw selection and installation to prevent common issues like splitting, cam-out, or corrosion. For power tool integration, we recommend optimal RPM and torque settings. Our screws are compatible with standard drivers; for collated screws, we advise on feed system adjustments.
Maintenance is minimal, but we offer advice on storage to preserve coating integrity. For stainless steel, we recommend avoiding contact with carbon steel tools to prevent surface contamination.
Information We Use to Configure Your Solution
To prepare an accurate quotation and sample, please provide the following details:
- Application: substrate materials, thickness, and environment (indoor/outdoor, humidity, chemicals)
- Dimensions: diameter, length, and thread type (coarse/fine, partial/full)
- Head and drive: head shape, drive type, and any underhead features (ribs, serrations)
- Material and finish: carbon steel grade or stainless steel type, coating specification
- Quantity and packaging: annual volume, packaging preference, and labeling needs
- Standards: any specific norms (e.g., DIN, ANSI) or performance tests required
Our sales engineers will review your requirements and propose a configuration that balances performance and cost.
FAQs
Q: What is your minimum order quantity (MOQ)?
A: For standard sizes, MOQ is typically 500 kg. For custom items, MOQ may be higher depending on tooling and material. We can discuss based on your project needs.
Q: Can you provide samples for testing?
A: Yes, we offer free samples for standard products. Custom samples may incur a nominal fee, which is deducted from the final order. Samples are shipped within 3-5 days.
Q: How do you ensure consistent quality across large orders?
A: We follow a strict quality control plan: first-piece inspection, in-process checks every hour, and final random sampling per batch. Our lab tests hardness, coating thickness, and salt spray resistance.
Q: Do you offer custom packaging and labeling?
A: Absolutely. We support retail-ready packaging, bulk cartons, poly bags, and custom labels with your branding. We also provide barcode and export documentation.
Q: What is your typical lead time for production?
A: For standard items, 15-20 days after order confirmation. For custom orders, 25-35 days including tooling and sample approval. We prioritize urgent orders when possible.