Sinsun Hardware, established in 2006, is a premier manufacturer and global exporter of high-strength structural fasteners. Operating from a state-of-the-art 30,000 square meter facility, we coordinate wire drawing, precision manufacturing, and thermal treatment processes to deliver over 20,000 SKUs globally.
For critical applications, standard washers fail to compensate for the slope of tapered structural channels and I-beams. Our ODM Beveled Square Washers are engineered specifically to provide parallel mating surfaces for nuts and bolt heads on tapered steel sections. This eliminates bending stresses on the bolt shank, preserving structural integrity in heavy-duty commercial steel frames.
Sinsun operates with a strict quality-first standard. Using German multi-station cold heading machines and Taiwanese engineering technology, we ensure all components, including our beveled square washers, satisfy rigorous international standards. We supply steel washers that maintain tight tolerances on bevel slopes (typically 2:12 or 8% slope profiles, matching ASTM F436 Type 1 and Type 3 parameters).
Our raw materials are sourced from elite steel mills like XING TAI Steel. We maintain full vertical integration by handling spheroidizing annealing, chemical pickling, and precision wire drawing in-house. This complete cycle ensures uniform mechanical properties, high tensile performance (≥1000 MPa), consistent tempering hardness (HRC 38-45 for structural grades), and robust anti-corrosion life (over 1000 hours in continuous salt spray testing).
Get an Engineering QuoteIn heavy engineering, beams (such as Standard I-beams and Channels) possess sloped inner flanges. Tightening a bolt directly against these sloped flanges generates structural misalignment, causing uneven loading on the bolt head. This leads to shear deformation and eventual structural fatigue. Our ODM Beveled Square Washers fix this engineering challenge by integrating a precise angle slope—typically 8% or 4%—allowing the bolted assembly to seal flatly, evenly transferring clamp loads.
Available in standard 8% (approx. 5-degree) and 4% angles, customized to mate seamlessly with specific channel steel shapes (MC, C, and I-beams) as mandated by AISC regulations.
Engineered to match ASTM F436 structural washer standards. Hardened through carbon restoration and heat tempering to verify compatibility with ASTM A325 and A490 structural bolts.
Coatings include Hot-Dip Galvanizing (HDG) to ASTM A153 standard, Zinc Plating, Black Oxide, or E-Coating to combat tough industrial and offshore conditions.
In the modern construction arena, material availability issues and regulatory shifts put intense pressure on global supply pipelines. EPC contractors and hardware distributors need partners capable of ensuring consistent quality and logistics execution.
Sinsun meets these demands with localized support, custom prototyping capabilities, and direct access to bulk manufacturing lines. Our 12,000-square-meter smart warehouse houses over 18,000 pallets. We guarantee prompt deliveries, preventing costly delays in transport and assembly. Operating under ISO 9001 and CE certifications, Sinsun ensures every batch is fully traceable from raw material melt to the finished washer.
All washers align with ASTM F436, DIN 434, and DIN 435 dimensions to ensure immediate site compatibility without design revisions.
Our engineers design custom taper angles and internal diameters for unusual structural frame geometries.
Every washer passes automated optical sorting stations to check for thickness accuracy and identify surface imperfections.
Over nearly two decades, Sinsun has evolved from a targeted regional factory into a high-capacity multinational partner. Our timeline highlights our focus on scale, quality management, and technical upgrades.
We welcome our international clients for regular on-site factory audits. This absolute transparency lets buyers inspect our raw material storage, heat treatment bays, surface finishing lines, and advanced testing labs. We participate in major global industry trade shows to discuss emerging market challenges and share structural fastening innovations.
Need technical clarification? Below are detailed explanations regarding standards compliance, sizing, materials, and ordering options for ODM Beveled Square Washers.
Connect with our structural fastening engineers for CAD drawings, material reports, and volume pricing plans.
