In the high-stakes world of structural integrity and industrial aesthetics, the choice of a fastener manufacturer defines the lifecycle of your project. As a leading Best Black Screw Manufacturer, Handan Yongnian District Dongshuo Fastener Manufacturing Co., Ltd. (established in 2015) integrates metallurgical expertise with cutting-edge surface treatment technologies.
Our black screws aren't just colored; they are engineered through complex processes like black oxide, black zinc plating, and phosphating to provide a dual benefit: extreme corrosion resistance and zero-light reflection for specialized applications.
Unlike paint, our black oxide process is a chemical conversion coating. This means there is no dimensional change to the screw, maintaining perfect thread tolerances for precision machinery. It provides an oil-retaining surface that significantly reduces friction and prevents galling.
We utilize premium Carbon Steel, Alloy Steel (Grade 8.8, 10.9, 12.9), and Stainless Steel. Each batch undergoes rigorous heat treatment to ensure the "Best Black Screw" title is backed by mechanical strength and fatigue resistance.
Our production lines adhere to DIN, ANSI, JIS, and ISO standards. Specifically, our black coatings are optimized for RoHS compliance, ensuring your international supply chain meets environmental mandates in the EU and North America.
Our company is committed to providing high-quality fastener products and providing customers with comprehensive solutions in various industries. As a reputable fastener manufacturer, we have advanced production equipment and a professional technical team to meet our customers' needs for different types of fasteners. Our core pillars: Design, Engineered, Manufactured.
01 Price Strategy: Negotiable pricing based on volume and packaging optimization.
02 Quality Samples: Prototype testing available to ensure spec alignment before mass production.
03 Eco-Materials: Use of environmentally friendly materials across all product lines.
04 OEM/ODM: Full customization capability including new mold design and logo integration.
Serving 50+ countries with localized compliance and technical support.
Full support for ASTM standards and inch-sized black bolts. Strategic warehousing options for JIT delivery in automotive corridors.
Strict adherence to DIN 912, DIN 934, and DIN 125 standards. 100% RoHS and REACH compliance for all black oxide and zinc finishes.
Rapid response for heavy industry and infrastructure projects. Specialized anti-humidity packaging to prevent oxidation during sea transit.
Our advantage lies in the integration of the factory. Unlike trading companies, we control the heat treatment and the blackening process in-house, ensuring that the black finish doesn't flake and the bolt strength is never compromised by hydrogen embrittlement.
Our factory is located in Handan City, Hebei Province, China. You can fly to Handan airport directly; it is only a one-hour drive to our facility. We welcome on-site audits from international clients.
Clients can send designs or logos. We open new molds, produce samples for confirmation, and then move to mass production once the technical parameters are validated by your engineering team.
For orders >= 1000USD, we typically require 30% T/T in advance and the balance before shipment. We accept multiple currencies including USD and RMB to facilitate smooth global transactions.
Black oxide is a conversion coating that adds no thickness, ideal for tight tolerances. Black zinc offers better corrosion resistance for outdoor use as it provides a sacrificial layer of protection.
Due to the fluctuation of raw material costs (Carbon steel/Zinc), prices change. Please contact us with your specific quantity and grade requirements for an instant, competitive quote.
As we move toward Industry 4.0, Dongshuo Fasteners is investing in automated visual inspection systems and eco-friendly trivalent black chromium plating. Our goal is to reduce our carbon footprint while increasing the longevity of every screw produced, ensuring we remain the world's best black screw manufacturer for the next generation of industrial challenges.
Dongshuo
