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Flat Washer

Flat Washers are the most common type of washer, designed to distribute the load of a threaded fastener evenly across a surface. They prevent damage to the mating surface, reduce wear, and provide a smooth bearing area for nuts and bolts. Manufactured to ASTM and DIN standards, they are available in various sizes, thicknesses, and materials. Flat washers are versatile and used across mechanical, structural, electrical, and decorative applications. They are essential in construction, automotive, machinery, and general engineering projects.

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Description

Premium Quality Flat Washer Supplier in Dubai, UAE

Unifastener Industries LLC is a reliable supplier and manufacturer of premium-quality Flat Washers in Dubai, UAE. The company specializes in industrial fastening and load distribution solutions designed for construction projects, machinery assembly, engineering works, automotive systems, and heavy-duty industrial applications. Flat Washers are specially designed fastening support components used to distribute load evenly, reduce surface damage, and improve fastening stability between nuts, bolts, and connected surfaces. These washers provide reliable support, reduce friction, and help prevent loosening in industrial and commercial applications. Manufactured using high-grade materials and advanced production standards, Flat Washers provide excellent strength, corrosion resistance, durability, and dependable long-lasting performance for demanding environments.


Standards:
– ASTM F844 (general-purpose flat washers)
– ASTM F436 (hardened flat washers for structural bolts)
– DIN 125 (standard flat washers)
– DIN 126 (thin flat washers)
– ISO 7089 / 7090 (plain washers, equivalent to DIN 125)

Grades:
– ASTM Grades: F844, F436
– DIN / ISO Grades: 4.6, 5.6, 8.8, 10.9 (washer compatibility with bolt grades)

Material Options:
– Carbon steel
– Stainless steel (A2 / A4 grades)
– Alloy steel (for structural use)
– Brass (decorative or non-magnetic applications)
– Aluminum (lightweight applications)

Diameter Range: M2 to M64 (metric) / 1/8″ to 2-1/2″ (inch)

Thickness Range: 0.5mm to 12mm depending on size and standard

Types:
– Standard flat washer (DIN 125 / ISO 7089)
– Thin flat washer (DIN 126)
– Large series washer (ISO 7093 / DIN 9021)
– Hardened structural washer (ASTM F436 / DIN 6916)

Properties:
– Distributes load evenly under bolt/nut head
– Prevents surface damage and pull-through
– Provides a smooth bearing surface for fastening

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

Add-ons:
– Can be supplied with bolts and nuts as assemblies
– Available in bulk or retail packaging
– Certification (MTC) available on request

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Star / Serrated Washers are locking washers with teeth or serrations designed to prevent loosening of fasteners under vibration and load. They bite into the surface of the assembly, creating additional friction and resistance to rotation. Manufactured to ASTM and DIN standards, they are available in internal, external, and combination serration types. These washers enhance joint security in dynamic or high-vibration environments. They are widely used in machinery, automotive, aerospace, electrical assemblies, and heavy engineering.
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Taper Washers are specialized washers designed to provide a level seating surface for bolts used on sloped flange beams and channels. They are manufactured to ASTM, DIN, and ISO standards in carbon steel, alloy steel, or stainless steel. The taper compensates for the slope of the flange, ensuring proper bolt alignment and full load distribution. Available in square and rectangular designs with galvanized, zinc plated, or stainless finishes, they ensure durability and reliability. They are widely used in structural steel construction, bridges, heavy equipment, and industrial machinery installations.
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Tow Tongue Washer

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Two Tongue Washers are mechanical locking washers with two tabs designed to secure fasteners against loosening under dynamic loads. They are manufactured to ASTM, DIN, and ISO standards in carbon steel, stainless steel, spring steel, or bronze. One tongue locks into a slot or keyway while the other is bent against a nut or bolt flat, creating a secure mechanical lock. Available in zinc plated, stainless, bronze, or phosphate finishes, they combine durability with corrosion resistance. They are widely used in automotive, railways, gear assemblies, machinery, and aerospace applications for reliable fastening security.