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Square Washer

Square Washers are flat washers with a square outer profile, providing a greater bearing surface than standard round washers. They are commonly used in timber construction, channel sections, and structural bolting applications. Manufactured to ASTM and DIN standards, they are available in multiple materials, sizes, and coatings. Their wide surface area prevents bolt heads and nuts from embedding into softer materials like wood. They are widely used in construction, railways, power transmission, and heavy structural assemblies.

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Description

Premium Quality Square Washer Supplier in Dubai, UAE

Unifastener Industries LLC is a reliable supplier and manufacturer of premium-quality Square Washers in Dubai, UAE. The company specializes in industrial fastening and load distribution solutions designed for structural steel works, construction projects, machinery assembly, engineering applications, and heavy-duty industrial installations. Square Washers are specially designed fastening support components used to distribute load over a larger surface area and provide improved stability in structural and industrial fastening applications. These washers help reduce surface damage, improve fastening strength, and ensure secure support for bolts and nuts in demanding environments. Manufactured using high-grade materials and advanced production standards, Square Washers provide excellent strength, corrosion resistance, durability, and dependable long-lasting performance for industrial applications.

Standards:
– ASTM F436 (structural hardened washers)
– ASTM A36 (structural steel plate washers)
– ASTM F844 (general-purpose flat washers)
– DIN 436 (square plate washers for wood and channel sections)
– ISO 887 (square washers, equivalent standard)

Grades:
– ASTM Grades: A36, F436, F844
– DIN / ISO Grades: 4.6, 5.6, 8.8 (washer compatibility with bolt grades)

Material Options:
– Carbon steel
– Structural steel plate
– Stainless steel (A2 / A4 grades)
– Galvanized steel
– Brass (for decorative or non-magnetic use)

Diameter Range: M6 to M36 (metric) / 1/4″ to 1-1/2″ (inch)

Thickness Range: 3mm to 25mm depending on size

Types:
– Standard square flat washer (DIN 436)
– Heavy square washer (for structural bolting)
– Oversized square washer (for timber and channel support)

Properties:
– Larger surface area compared to round washers
– Distributes load evenly, prevents pull-through
– Suitable for wood, channels, and structural applications

Coating Options:
– Plain (self-color, oiled)
– Hot-dip galvanized (ASTM A153 / DIN EN ISO 1461)
– Zinc electroplated
– Black oxide
– Nickel plated (decorative applications)

Add-ons:
– Can be supplied with bolts and nuts
– Available in bulk or retail packaging
– Supplied with certification (MTC) for structural projects

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