Hongniu Fasteners DIN7603 Seal Washer Copper/Brass Sealing Gaskets Hot Selling

• Customization: Available
• Type: Flat Gasket
• Material: ODM/OEM
• Model NO.: DIN7603
• Combination Washer Structure: ODM/OEM
• Combination Washer Packaging: ODM/OEM
• Spring Washer Type: ODM/OEM
• Shipping Time: Around 7-40 Days
• Freight: Real-Time Quotation
• Thickness: ODM/OEM
• Dia: ODM/OEM
• Transport Package: Carton Package
• Specification: ODM/OEM
• Trademark: ODM/OEM
• Origin: China
• Package Size: 35.00cm * 20.00cm * 20.00cm
• Package Gross Weight: 23.000kg

Product Description

Choose us, choose quality. Your reliable partner in fastening solutions.

Support the production and customization of various fasteners.
In Chinese, "Hongniu" means strength and excellence.
Our products live up to our name — high-quality fasteners that take your products to the next level.

Hongniu Fasteners

Business cooperation is based on honesty and trust.
We will do our utmost to be your reliable and long-term supplier, safeguarding the quality of your products.
Our relationship is not merely that of a buyer and a seller — we are partners who depend on each other to create both wealth and reputation.

Product Overview

DIN7603 Seal Washers are designed to provide reliable sealing between connecting parts in hydraulic, pneumatic, and fuel systems.
They are typically used with threaded fittings and bolts to prevent fluid leakage under pressure.

We supply a wide range of DIN7603A (flat type) and DIN7603C (with inner ridge) washers in copper, aluminum, fiber, and soft iron materials.
With precise manufacturing and surface finishing, our sealing washers ensure excellent corrosion resistance, tightness, and durability.

Size (mm)	Inside Diameter (d1)	Outside Diameter (d2)	Thickness (s)	Material Options	Type (Form)
M6	6.0	10.0	1.0	Copper / Aluminum	A / C
M8	8.0	12.0	1.0	Copper / Aluminum	A / C
M10	10.0	14.0	1.0	Copper / Aluminum	A / C
M12	12.0	16.0	1.5	Copper / Aluminum	A / C
M14	14.0	18.0	1.5	Copper / Aluminum	A / C
M16	16.0	22.0	1.5	Copper / Aluminum	A / C
M20	20.0	26.0	2.0	Copper / Aluminum	A / C

Finish Advantages

Packaging & Delivery

Carbon Steel: cost-effective and durable
Stainless Steel (A2/A4): excellent corrosion resistance
Alloy Steel: high tensile strength and wear resistance

1. Packaging: Bulk in cartons, plastic bags, or customized boxes
Carton Size: 25kg / carton
2. Pallet: Standard export wooden pallet
3. Lead Time: 7–25 days depending on order quantity
4. Shipping: By sea, air, or express (DHL, FedEx, UPS)

Applications

1. Automotive engines & fuel systems
2. Hydraulic and pneumatic equipment
3. Plumbing and oil pipelines
4. Mechanical sealing connections

Company Profile

Company introduction

Yangzhou Hongniu Import and Export Co., Ltd. is the foreign trade subsidiary of Jiangsu Hongding Automotive Parts Co., Ltd.
It was founded in June 2000. Located in Tangzhuang Town Industrial Park, Gaoyou City, with convenient transportation.
The company covers an area of 35000 square meters and currently has over 300 employees, including 70 high-level and intermediate professional and technical personnel. Registered capital of 20 million yuan, total assets of 78 million yuan, and fixed assets of 56 million yuan. 
Main products: Various types of automotive parts and fasteners, castings and forgings, etc. 
Widely used in industries such as aerospace, machinery, wind power, textiles, automotive manufacturing, petroleum, forging, etc.
We have maintained cooperative relationships with dozens of large and medium-sized enterprises in China, and are highly valued by our customers due to our good reputation and excellent quality.

Why Choose Us 

1. 20+ Years Manufacturing Experience
2. ISO9001 Certified Factory
3. Support OEM / ODM & Custom Packaging
4. Fast Delivery and Competitive Price
5. Professional Export Team for the Europe, Australia, North and South America,etc.

Certifications

FAQ

Please feel free to talk more with us!

Q1: What is the minimum order quantity?
A1: Products in stock with no MOQ. If you need us to produce, the MOQ is 10,000pcs.
Q2: Can you provide a sample? 
A2: Sure, some samples are provided free of charge, but not including freight. 
Q3: How long is your delivery time? 
A3: Generally, it is 10-15 days if the products are in stock. or it is around 30 days to produce, and it is according to quantity. 
Q4: What is your payment method? 
A4:  T/T, 30% deposit in advance, balance payment before loading.  Order less than 5,000USD, 100% payment to reduce the bank charges. 
Q5: Can you customize the product according to the requirements of drawing sheets and so on? 
A5: Yes, please feel free to talk more details with us and send us the design drafts.