Products Description
The DIN 9021 Large Flat Washer is a type of flat washer designed to distribute the load of a fastener (bolt or screw) over a larger surface area, preventing damage to the material being fastened and ensuring a secure connection. These washers conform to the DIN 9021 standard, which specifies the dimensions, material, and performance requirements for washers used in various mechanical applications.
The DIN 9021 washer features a larger outer diameter than standard flat washers, providing more surface area for load distribution. This makes it especially suitable for use with larger bolts or fasteners where additional support is required, particularly in applications involving softer materials or where load-bearing capacity is crucial.
Key Parameters:
Standard: DIN 9021
Material Options: Carbon Steel, Stainless Steel (A2, A4), Brass, and others
Outer Diameter (OD): Ranges from 16 mm to 50 mm, depending on the washer size
Inner Diameter (ID): Corresponds to bolt sizes, typically ranging from M6 to M36
Thickness: Typically between 1.6 mm to 3.0 mm
Grade: Depending on material – common grades include 4.8 (steel), A2, or A4 (stainless steel)
Finish: Zinc Plated, Hot-Dip Galvanized, Stainless Steel, Black Oxide, or other coatings
Shape: Round, with a smooth and flat surface to distribute force evenly
Tolerance: Conforms to DIN 9021 specifications, ensuring precise dimensional accuracy
Products Process
Material Selection:The manufacturing of DIN 9021 Large Flat Washers begins with the selection of high-quality materials, such as carbon steel, stainless steel, or other alloys, depending on the application. Stainless steel is often chosen for its excellent corrosion resistance, while carbon steel is used for general-purpose applications.
Blanking:The raw material sheet is cut into flat blanks using a precision stamping machine. This step ensures that the basic shape of the washer is formed to the correct diameter.
Hole Punching:A hole of the required diameter is punched in the center of each blank. The hole size is typically designed to match the corresponding bolt or fastener size.
Heat Treatment (If Required):In some cases, the washers undergo heat treatment to increase their hardness and strength, making them more durable under stress and improving their wear resistance.
Surface Finishing:The washers are then subjected to surface treatments such as galvanizing, zinc plating, or coating with other anti-corrosion finishes to enhance their resistance to rust and wear, especially in outdoor or harsh environments.
Quality Control:The finished washers undergo strict quality control checks, including dimensional verification and material testing, to ensure they meet the requirements of the DIN 9021 standard and perform as expected in their intended applications.
Products Application
Construction:These washers are widely used in construction projects where bolts or screws are fastened into softer materials (such as wood or plastic) or where extra support is required to prevent bolt pull-through.
Automotive:Used in automotive applications, particularly in securing components where high torque is applied or where vibration might loosen the fasteners over time. Large flat washers help in providing a secure, long-lasting connection.
Machinery:Ideal for machinery assemblies where large fasteners are used and the surface area needs to be maximized to ensure even load distribution and reduce the risk of surface damage or material deformation.
HVAC and Electrical Systems:Commonly found in HVAC installations and electrical systems where equipment requires secure attachment to various structural or base materials.
Heavy Duty and Industrial Equipment:Large flat washers are used in heavy-duty machinery and industrial equipment, such as manufacturing machinery, heavy-duty vehicles, and structural steel assemblies, where the need for a strong, load-distributing fastener is paramount.
FAQ
1. How can I place an order?
You can contact any of our sales person for an order. Please provide the details of your requirements as clear as possible. So we can send you the offer at the first time.For designing or further discussion, it is better to contact us with Skype, TradeManger or QQ or WhatsApp or other instant ways, in case of any delays.
2. When can I get the price?
Usually we quote within 24 hours after we get your inquiry.
3. Can you do the design for us?
Yes. We have a professional team having rich experience in gift box design and manufacturing.Just tell us your ideas and we will help to carry out your ideas into perfect boxes.
4. How long can I expect to get the sample?
After you pay the sample charge and send us confirmed files, the samples will be ready for delivery in 1-3 days. The samples will be sent to you via express and arrive in 3-5 days.
5. What about the lead time for mass production?
Honestly, it depends on the order quantity and the season you place the order.Alway 25-28days based on general order.
6. What is your terms of delivery?
We accept EXW, FOB, CFR, CIF, etc. You can choose the one which is the most convenient or cost effective for you.
7. What is the payment way?
1)TT or Wester Union for the trial order
2)ODM, OEM order, 30% for deposit,70% against the copy B/L.
We are factory ,we can guarantee our price is first-hand, High quality and competitive price.
Hot Tags: din9021 large flat washer, China din9021 large flat washer manufacturers, suppliers, factory, Hardware Stamping Parts, Flat Washer For Pin Shaft, Steel Open End Blind Rivets, Combination Tooth Lock Washer, Stamping Die Parts, Stainless Steel Open End Blind Rivets