DIN ISO Standards Copper/Brass/Stainless/Carbon Steel/Metal Plain/Zinc Plated/Galvanized Gasket Flat/Spring/Lock/Rubber/Square/Heavy/Shim/Star/Plastic Washer

Product Description

Welcome to Qewitco!

    We are a professional fastener factory specializing in standard and custom non-standard washers.
    Our product portfolio includes Flat Washers, Lock Washers, Spring Washers, Rubber Washers, Toothed Washers, Wave Washers, Belleville Washers, Tab Washers, Bonded Sealing Washers, Nylon Washers, PTFE Washers, Brass Washers, Stainless Steel Washers, Aluminum Washers, Fiber Washers, EPDM Washers, Square Washers, ultra-thin & thick washers and all kinds of special-shaped washers.

    We can customize dimensions, materials and surface treatments according to your drawings or samples, to meet requirements of shock absorption, sealing, anti-slip and pressure resistance. OEM & ODM available.  Please send us your drawings for inquiry!

Product Description

Although washers are small, they play a crucial role in mechanical assemblies. Precision-engineered to fulfill a variety of key functions:

    Load Distribution—Our Flat Washers are designed to evenly distribute pressure beneath bolt heads or nuts, effectively preventing surface damage and material deformation, thereby ensuring the long service life and structural integrity of your assemblies.

Standard: DIN 125, DIN 9021,RoHS & REACH Compliant 
Size: M3, M4, M5, M6, M8, M10, M12; Custom outer diameter & thickness available 
Material: Carbon Steel / A2(304) Stainless Steel
Grade:Normal 
Finish: blue white zinc, yellow zinc, black zinc, black oxide, hot-dip galvanized, Dacromet, Geomet, phosphate, plain
Packaging: Bulk Pack / Color Small Box

Lock Washer

    Vibration Resistance—Locking washers (including spring-type and serrated washers) are specifically designed to provide the necessary tension in dynamic or high-vibration environments, preventing loosening and ensuring reliable performance.

    Inner serrations bite bolt threads to realize anti-slip, anti-loosening and electrical continuity. Suitable for compact installation, small motors, low-voltage electrical cabinets and nameplate mounting.

Internal Tooth Lock Washer DIN 6798

External Tooth Lock Washer DIN 6797

Standard: DIN6798, RoHS & REACH Compliant 
Size: M3, M4, M5, M6, M8, M10, M12; Custom sizes available 
Material: Carbon Steel ,Stainless Steel
Finish: blue white zinc, yellow zinc, black zinc, black oxide, Dacromet, Geomet, phosphate
Packaging: Bulk Pack / Color Small Box

Standard: DIN 6797, RoHS & REACH Compliant 
Size: M3, M4, M5, M6, M8, M10, M12; Custom sizes available 
Material: Carbon Steel,Stainless Steel
Finish:blue white zinc, yellow zinc, black zinc, black oxide, Dacromet, Geomet, phosphate
Packaging: Bulk Pack / Color Small Box

Spring Washer

Standard: DIN127

Material:Carbon Steel, Stainless Steel

Size: M2 ~ M48

Finish:Plain,Stainless Steel,Zinc Plated,Galvanized,Customized

Sample: Free(not include shipping)

ODM/OEM: Available

Application: Machinery and Equipment, Steel Structures, Automotive, Photovoltaics, Furniture

Rubber Washer

    Insulation and Corrosion Protection—Non-conductive washers made of nylon and rubber effectively isolate electrical current, while our stainless steel or specially coated washers are designed to resist corrosion in harsh conditions, providing exceptional protection.

    Alignment Compensation—Spherical or conical washers are specifically designed to compensate for angular misalignment between fasteners and surfaces, ensuring proper alignment and enhancing structural integrity.

    Sealing—Soft washers made of copper or rubber are ideal for creating fluid-tight seals in piping or hydraulic systems, preventing leaks and ensuring efficient operation.

Product Type:EPDM bonded sealing washer

Material & Finish: StainlessSteel:SS304+EPDM,Steel Zinc Plated +EPDM

Grade: A2-70 / A4-80

Size: #8,#10,M4.2,M4.8,5.516,6.318

Star / Serrated Earthing Washer

Double-sided serrations pierce paint and oxide coatings to form reliable earthing connection with auxiliary anti-loosening function. Specially used for electrical cabinets, PV supports, lightning protection and equipment grounding.

Square Washer

Square profile prevents rotation inside square grooves and extrusion slots with larger bearing area. Applied in timber components, flat-pack furniture, square steel tubes and aluminum frame assembly.

Square Washer

Serrated Earthing Washer/Star Washer/Timber Connector/Sided Tooth Plate Connector

Standard: DIN, RoHS & REACH Compliant 
Size: M4, M5, M6, M8; Custom sizes available 
Material: Carbon Steel 
Finish: Trivalent Blue White Zinc, Stainless Steel,Trivalent Yellow Zinc, Black Zinc, Black Oxide, Hot Dip Galvanized, Dacromet, Geomet Zinc Flake, Black Phosphate
Packaging: Bulk Pack / Color Small Box

Standard: DIN, RoHS & REACH Compliant 
Size: M4, M5, M6, M8, M10, M12; Custom sizes available 
Material: Carbon Steel 
Finish:

Blue White Zinc Plating, Stainless Steel,Customized
Packaging: Bulk Pack / Color Small Box

Brass/Copper Washer

Brass washers offer excellent electrical conductivity, corrosion resistance, and ductility. They evenly distribute clamping force, protect workpiece surfaces from scratches and wear, reduce the risk of loosening, and provide reliable insulation and sealing.
We offer a variety of types, including flat brass washers and spring brass washers, which are widely used in electrical components, mechanical assemblies, piping systems, and jewelry hardware. We support custom sizes, thicknesses, and surface treatments, and our products comply with ISO standards.

    Our washers are available in a variety of materials (steel, plastic, brass,copper,rubber) and shapes (flat washers, square washers, insulating washers, heavy washers,light washers,shim washers,lock washers, corrugated washers, serrated washers), significantly enhancing the performance, durability, and safety of fasteners. With precision and exceptional quality, we serve a wide range of industries, from automotive to aerospace.

Common Applications

1.Flat Washer: Pressure distribution, general assembly 
2.Spring Lock Washer: Anti-loosening for mild vibration 
3.Internal Tooth Washer: Compact anti-loosening & earthing 
4.External Tooth Washer: Sheet metal conductive connection 
5.Earthing Serrated Washer: Electrical grounding system 
6.Conical Cup Washer: Decoration & elastic leveling 
7.Serrated Anti-slip Washer: Thin sheet anti-rotation 
8.Square Washer: Timber & extrusion anti-turn fitting 
9.Claw Earthing Washer: Heavy-duty piercing grounding

10.Square Bevel Washer: Channel steel inclined installation

Customer Reviews

Factory And Company Profile

QINGDAO FASTENERS CO.,LTD

Headquartered in Qingdao, China, Qewitco is a British company with a global presence. Since 2004, we have earned a reputation as a leading supplier of industrial consumables and fasteners, serving customers across Europe, North America, Southeast Asia, and beyond.

Led by a British management team, Qewitco strictly adheres to British quality standards and excels in supply chain optimization. We source premium products from rigorously audited manufacturers in China, Taiwan, Malaysia, Vietnam, and Thailand, ensuring competitive pricing and reliable production.

With over 20 years of industry expertise, we provide tailored and cost-effective solutions to meet the unique needs of each partner. Our services include:

Personalized account management to align with your business objectives and timelines

Multi-stage quality assurance, from raw material inspection to finished product testing

Flexible, customized sourcing services for specialized or hard-to-source items

Customizable packaging and logistics solutions to optimize global distribution processes

With products exported to more than 35 countries, Qewitco is your trusted partner. Our mission is to exceed your expectations by ensuring seamless delivery from production to your warehouse. We combine Western business ethics with the strengths of Asian manufacturing to provide you with unparalleled value and service.

Certifications

We hold multiple international certifications including ISO, CE, SGS, and comply with various industrial standards such as DIN (German Standard), BS (British Standard), and GB (Chinese National Standard).

Mainly Product

FAQ

Q1: What standards do your washers comply with?

A:We supply washers according to DIN, ISO, GB, ASME standards. Available types: flat washers, spring lock washers, internal & external tooth lock washers, square washers, brass cup washers,etc. Custom drawings are acceptable.

Q2: What materials are available for the washers?

A: Carbon steel, stainless steel (SS201, SS304, SS316), brass, spring steel. Surface treatment: zinc plating, hot-dip galvanizing, passivation, black oxide as required.

Q3: Can you produce non-standard washers per our drawing or sample?

A: Yes. We support custom dimensions, thickness, shape and material. Send us your drawings or samples, we will calculate the quotation and MOQ for you.

Q4: What is your MOQ for washers?

A: MOQ depends on material and specifications. Standard sizes have low MOQ; custom non-standard items require larger minimum orders. Contact us for details.

Q5: How do you guarantee the quality of washers?

A: All products are inspected before shipment. We can provide material test certificates (MTC), dimension reports and third-party inspection if needed.

Q6: What packaging options do you offer?

A: Inner plastic bags + cartons, then pallet packing. We can also follow your customized packaging and labeling requirements.

Q7: Can washers be used in high temperature or corrosion environments?

A: Stainless steel and brass washers are suitable for anti-corrosion applications. For high temperature working conditions, please tell us your working environment so we can recommend proper material.

If you have any questions about our products or purchasing requirements, please feel free to send us an inquiry. We will check and reply to you as soon as possible, offering professional product support and purchasing solutions.