PROFESSIONAL MANUFACTURER OF HARDWARE PRODUCTS
Jinan Meierde Industry Co., Ltd
Square washers
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Product introduction
Square Washers | Heavy-Duty Square Plate Washers for Bolted Connections
Square washers in carbon steel, stainless steel, and galvanized finishes. Ideal for timber, structural, and industrial fastening. Custom sizes and OEM support available.
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Product Overview
Square washers, also known as square plate washers or square hole washers, are flat, square-shaped fastening components placed under nuts, bolts, and screw heads. Compared with standard round washers, their larger bearing surface helps distribute load more evenly, reduce surface damage, and resist rotation during tightening.
They are widely used in timber construction, structural steel assemblies, machinery, fencing, decking, and general industrial applications where a strong, stable, and anti-rotation bearing surface is required.
Key Features
Square shape for greater bearing area – Helps spread pressure and protect soft or thin materials.
Anti-rotation design – Square edges resist turning in wood and slotted applications.
High load-bearing capacity – Suitable for structural and heavy-duty fastening.
Precise hole punching – Clean, consistent holes for smooth bolt installation.
Multiple material and finish options – Available in carbon steel, stainless steel, and galvanized finishes.
Metric and imperial sizes – Standard and custom dimensions available.
OEM & ODM support – Custom drawings, materials, finishes, and packaging accepted.
Technical Specifications
| Item | Details |
|---|---|
| Product Name | Square Washer / Square Plate Washer / Square Hole Washer |
| Material | Carbon steel, stainless steel 304/316, alloy steel, malleable iron, brass (optional) |
| Standard | DIN 436, DIN 434, ASME B18.22.1, ANSI, ISO, or customer drawings |
| Size Range | M3–M36, 1/8"–2", or customized |
| Thickness | 0.5 mm–10 mm, or customized |
| Hole Type | Round hole, square hole, slotted hole (optional) |
| Surface Finish | Plain, black oxide, zinc plated, hot-dip galvanized, HDG, nickel plated, Dacromet |
| Tolerance | According to standard or customer requirement |
Applications
Square washers are commonly used in:
Timber construction and woodworking
Decking, fencing, and pergolas
Structural steel and bolted connections
Pole buildings and agricultural equipment
Machinery and automotive assemblies
Electrical and plumbing installations
Marine and outdoor projects with corrosion-resistant requirements
DIY and general repair work
Why Choose Our Square Washers
Reliable Quality: Manufactured with strict dimensional and material control.
Custom Manufacturing: Non-standard sizes, materials, and finishes available.
Competitive Pricing: Factory-direct supply for bulk orders.
Fast Delivery: Stable production capacity and efficient order processing.
Professional Support: OEM/ODM service and customized packaging.
Wide Export Experience: Serving customers in construction, hardware, and industrial markets worldwide.
Product message
Jinan Western Industrial park, Jinan City, Shandong Province
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