Square Washer – Engineered for Maximum Load Distribution and Structural Integrity
Malaxy square washers are precision-engineered to provide superior load distribution and pull-through resistance in demanding fastening applications. Unlike traditional round washers, the square geometry offers a larger bearing surface per fastener and inherent anti-rotation stability, making them indispensable for wood construction, structural steel connections, concrete flooring, and heavy equipment installations.
Why Choose Square Washers Over Round Washers?
The square shape prevents the washer from rotating or tilting when the fastener is tightened, ensuring a more secure and stable connection—particularly critical in soft materials such as wood, composite, or plastic where round washers may sink or spin. The enlarged surface area effectively distributes high clamping loads, preventing pull-through and material deformation under heavy tension or vibration.
Material Options
Carbon Steel: Grades 4.6, 8.8 – cost-effective for general-purpose timber and concrete applications
Stainless Steel: A2-70 (304), A4-70 (316) – superior corrosion resistance for marine environments, outdoor structures, and electrical grounding systems
Hardened Alloy Steel: Heat-treated (HRC 25–40 min) – for high-strength structural bolting (Grade 8.8/10.9 screw compatibility)
Mild Steel (Low Carbon): Good strength and malleability at low cost for light-duty applications
Surface Finishes (Corrosion Protection)
Plain (Self-Colored / Oiled) – dry assembly or post-installation coating
Zinc Plated (CR+3) – standard indoor corrosion protection
Hot-Dip Galvanized – heavy-duty outdoor protection for exposed timber structures
Black Oxide – mild corrosion resistance with matte finish, often combined with case hardening
Dacromet / Geomet – high-performance anti-corrosion for extreme environments
Key Standards & Certifications
DIN 436 – Square washers, especially for wood constructions (German standard, widely adopted across Europe)
DIN 434 – Square taper washers for U-sections (C-channel / U-channel applications)
DIN 435 – Square taper washers for I-sections (I-beam / H-beam structural connections)
DIN 440 – Washers with square hole, extra large outside diameter for timber constructions
ASTM F844 – Steel plain washers (round and miscellaneous shapes), unhardened, for general use
ASME/ANSI B18.21.1 – US standard for flat washers, Type A, covering square washer dimensions
ISO 9001 certified manufacturing
Applications
Application Area | Key Requirements | Recommended Specification |
|---|
Timber Construction / Wood Framing | Prevent pull-through, load distribution over large area | DIN 436 / DIN 440, HDG or zinc plated |
Structural Steel Connections | High clamping force, anti-rotation stability | DIN 434/435 (taper), hardened steel |
Concrete Flooring & Anchoring | Embed in concrete, resist pull-out | Hot-dip galvanized, large OD |
Electrical Grounding & Earthing | Conductive, anti-corrosion, secure cable clamping | Stainless steel A2/A4 |
Channel Applications (Unistrut type) | Fit into slotted channels, prevent spinning | ASME B18.21.1, plain or zinc |
Heavy Equipment & Machinery Mounting | High load capacity, vibration resistance | Hardened steel, Dacromet coating |
Marine & Outdoor Structures | Extreme corrosion resistance | Stainless steel A4-70 (316) |
Cyclone Resistant Housing (Australia/NZ) | High wind load resistance | Galvanized steel, large size |
✅ Why Choose Malaxy Square Washers?
Precision stamped / punched for dimensional accuracy
Larger bearing surface than standard round washers—prevents pull-through in soft substrates
Square geometry prevents rotation under vibration and dynamic loads
Wide selection of materials and finishes for any environmental condition
Compliant with multiple international standards (DIN, ASTM, ASME, ISO)
OEM and custom sizes available upon request
Competitive pricing with flexible MOQ for B2B buyers
Trusted China fastener manufacturer with global export experience
MALAXY, a professional China fastener manufacturer with more than 20 years of manufacturing experience, obtained ISO 9001:2015 certification on August 17, 2026. With a wide range of screws, bolts, nuts, washers, threaded rods, anchors and custom fasteners, plus CE, RoHS and REACH compliance, MALAXY serves B2B buyers in more than 70 countries. Through factory-direct manufacturing, strict quality control and global export experience, MALAXY is committed to providing reliable, high-quality fasteners and long-term OEM and wholesale solutions for international customers.Malaxy Company News
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