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Picot Washer

Picot Washers are locking washers with serrated or toothed edges designed to prevent loosening of fasteners under vibration and dynamic loads. They are manufactured to ASTM, DIN, and ISO standards in carbon steel, stainless steel, spring steel, or brass. The serrated teeth bite into the surface, providing a secure grip and enhanced load distribution. Available in internal, external, and heavy-duty variants with multiple coatings, they ensure durability and resistance to vibration loosening. They are widely used in automotive, machinery, aerospace, electronics, and general engineering applications.

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Description

Premium Quality Picot Washer Supplier in Dubai, UAE

Unifastener Industries LLC is a reliable supplier and manufacturer of premium-quality Picot Washers in Dubai, UAE. The company specializes in industrial fastening and locking solutions designed for machinery assembly, engineering works, electrical systems, construction projects, and heavy-duty industrial applications. Picot Washers are specially designed locking washers used to prevent nuts and bolts from loosening due to vibration, movement, and dynamic loads. These washers provide enhanced grip, secure fastening support, and reliable stability for critical industrial applications requiring dependable locking performance. Manufactured using high-grade materials and advanced production standards, Picot Washers provide excellent strength, corrosion resistance, durability, and long-lasting performance in demanding industrial environments.


Standards:
– DIN 6798 (toothed lock washers – reference)
– ISO 887 (plain washers – small series)
– ASTM F436 (hardened steel washers for structural bolts)
– ASTM A240 / A276 (stainless steel for mechanical washers)
– ISO 9001 (manufacturing quality compliance)

Grades:
– Carbon steel (case hardened)
– Stainless steel A2 / A4 (AISI 304 / 316 for corrosion resistance)
– Spring steel (for high tension and locking ability)
– Brass / bronze (for electrical and decorative use)

Material Options:
– Carbon steel (zinc plated, phosphate, black oxide)
– Stainless steel (natural, polished, passivated)
– Spring steel (hardened and tempered)
– Brass or bronze (non-magnetic, corrosion-resistant)

Size Range:
– Inner diameter: M3 to M36
– Outer diameter: as per DIN / ASTM specifications
– Thickness: 0.5mm to 6mm

Types:
– Standard picot washer (with serrated edges)
– Internal serrated picot washer
– External serrated picot washer
– Heavy-duty picot washer
– Stainless steel picot washer

Properties:
– Provides locking action to resist loosening under vibration
– Serrated/teethed design grips the surface securely
– Ensures better load distribution compared to plain washers
– Reusable, offering strong mechanical locking without adhesives
– Suitable for dynamic assemblies and machinery exposed to vibration

Coating Options:
– Zinc electroplated (clear, yellow, or black)
– Hot-dip galvanized (for outdoor/heavy-duty use)
– Black oxide finish
– Stainless steel natural finish

Add-ons:
– Can be supplied with flat washers for combined use
– Available in metric and inch sizes
– Certification/test reports (hardness, torque resistance, coating life) available on request

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