Precision Hardware
Flat washers for Bolt Screw
Source metal flat washers in carbon steel, SS304, SS316, brass, copper, and aluminum. DIN, ISO, GB/T and ASME options. Contact Juniq Precision for specifications and quotations.
Features
- Multiple Material Options
- Precision and Commercial Grades
- Various Dimensions
- Multiple Surface Finish Options
- Chamfering is optional
Applications
Metal Flat Washers for Bolt Screw
1. Product Overview
Metal Flat Washers for Bolt Screw are essential fastening components designed to distribute clamping loads, protect contact surfaces, and provide a stable bearing surface between bolts, screws, nuts, and assembled parts. Jun iq Precision supplies metal flat washers in carbon steel, stainless steel SS304 (A2), stainless steel SS316 (A4), brass, copper, and aluminum for industrial and commercial fastening applications.
Our flat washers for bolts and screws are available in different dimensions, material options, and surface finishes to suit machinery, equipment assembly, construction, metal fabrication, and general hardware applications. Standard-based and customized specifications can be discussed according to your project requirements.
Looking for a reliable metal flat washer supplier? Send us your required inner diameter, outer diameter, thickness, material, and quantity for specification confirmation and a quotation.
2. Key Features of Metal Flat Washers
Multiple Material Options: Carbon steel, SS304 stainless steel, SS316 stainless steel, brass, copper, and aluminum, subject to availability.
Standard-Based Specifications: Options may include DIN 125A, DIN 9021, ISO 7089, GB/T 95, GB/T 97.1, and ASME B18.22.1. The applicable standard depends on the required washer type and dimensions.
Surface Treatment Choices: Plain finish, black oxide, zinc plating, hot-dip galvanizing, nickel plating, and passivation, depending on material compatibility.
Different Hardness Requirements: Hardness options such as 100 HV, 200 HV, and 300 HV may be available for applicable materials and specifications.
Flexible Sourcing: Standard specifications and customized metal flat washers can be discussed for different fastening projects.
3. Advantages of Flat Washers for Bolts and Screws
Load Distribution
A metal flat washer increases the bearing area beneath a bolt head or nut, helping distribute clamping force over the contact surface. This can reduce localized pressure and help protect softer or finished materials from damage.
Surface Protection
Using a suitable flat washer between fastening components and the assembled surface can help reduce scratches, indentation, and direct metal-to-metal contact during installation.
Material Selection for Different Environments
Carbon steel flat washers are commonly used for general fastening applications. SS304 and SS316 stainless steel washers may be suitable for applications requiring corrosion resistance. Brass, copper, and aluminum flat washers are available for selected electrical, mechanical, and specialized assemblies.
Flexible Specification Matching
Choosing the correct inner diameter, outer diameter, thickness, material, and surface treatment helps ensure that a flat washer fits the bolt or screw and performs as intended in the assembly.
4. Technical Parameters of Metal Flat Washers
The following table provides an overview of available specifications. Final dimensions and mechanical properties should be confirmed against the selected standard and material.
| Parameter | Specification |
|---|---|
| Product Name | Metal Flat Washers for Bolt Screw |
| Product Type | Flat Washer / Plain Washer |
| Material | Carbon Steel, Stainless Steel SS304 (A2), Stainless Steel SS316 (A4), Brass, Copper, Aluminum |
| Applicable Standards | GB/T 95, GB/T 97.1, DIN 125A, DIN 9021, ISO 7089, ASME B18.22.1, as applicable |
| Product Grade | Grade A (Precision) / Grade C (Commercial), where applicable |
| Hardness Options | 100 HV / 200 HV / 300 HV, subject to material and specification |
| Inner Diameter (ID) | According to the selected standard and size |
| Outer Diameter (OD) | According to the selected standard and size |
| Thickness | According to the selected standard and size |
| Surface Treatment | Plain Finish, Black Oxide, Zinc Plating, Hot-Dip Galvanizing, Nickel Plating, Passivation, subject to availability |
| Surface Appearance | Natural Metal, Black, Silver, or other available finishes |
| Corrosion Resistance | Depends on base material, surface treatment, and operating environment |
| Application | Bolts, Screws, Nuts, Machinery, Equipment, Construction, and General Fastening |
| Customization | Material, dimensions, and surface treatment, subject to confirmation |
| Packaging | Bags, Cartons, Bulk Packaging, or customized packaging, subject to order requirements |
Need a specific size? Send Jun iq Precision your bolt or screw size, washer dimensions, preferred material, applicable standard, and order quantity. We will help confirm the suitable specification.
5. Available Materials and Surface Treatments
| Material | Typical Applications | Possible Surface Treatment |
|---|---|---|
| Carbon Steel | General machinery, equipment assembly, and construction | Zinc Plating, Black Oxide, Hot-Dip Galvanizing, Plain Finish |
| Stainless Steel SS304 (A2) | General industrial and outdoor fastening applications | Plain Finish, Passivation, subject to availability |
| Stainless Steel SS316 (A4) | Applications requiring enhanced corrosion resistance | Plain Finish, Passivation, subject to availability |
| Brass | Selected electrical, decorative, and mechanical assemblies | Plain Finish, Nickel Plating, subject to availability |
| Copper | Electrical and specialized mechanical applications | Plain Finish, Nickel Plating, subject to availability |
| Aluminum | Lightweight assemblies and selected equipment applications | Plain Finish or other compatible treatments, subject to availability |
Surface treatment availability depends on the material, washer dimensions, order quantity, and required finish. Confirm the exact treatment before ordering.
6. Applications of Metal Flat Washers
Industrial Machinery and Equipment
Metal flat washers for bolts and screws are used in machinery frames, equipment housings, mounting brackets, and mechanical assemblies. The washer helps distribute clamping force across the contact surface.
Automotive and Mechanical Assemblies
Suitable flat washers can be used in selected vehicle components, repair work, maintenance, and mechanical fastening assemblies. Material and specification should be selected according to the design requirements.
Construction and Metal Fabrication
Carbon steel and galvanized flat washers are commonly used with bolts and screws in structural components, metal frames, brackets, and general construction fastening applications.
Electrical and Electronic Equipment
Brass, copper, aluminum, and stainless steel washers may be used in selected electrical enclosures, mounting assemblies, and equipment installations. Electrical conductivity and other application requirements should be evaluated before material selection.
General Hardware and Maintenance
Metal flat washers are widely used in equipment repair, furniture hardware, installation work, and routine maintenance where a suitable bearing surface is required beneath a bolt head or nut.
7. How to Select and Install Flat Washers
Identify the Bolt or Screw Size: Confirm the nominal fastener diameter and the required washer dimensions.
Select the Material: Choose carbon steel, SS304, SS316, brass, copper, or aluminum according to load, corrosion exposure, and application requirements.
Confirm the Standard: Check the applicable DIN, ISO, GB/T, or ASME specification and verify dimensions.
Choose the Surface Treatment: Select a compatible finish based on corrosion protection, appearance, and operating conditions.
Install Correctly: Place the flat washer between the bolt head or nut and the bearing surface as specified by the assembly design.
Tighten Appropriately: Follow the equipment or fastener manufacturer's recommended tightening torque. A flat washer does not automatically prevent loosening.
8. Why Choose Jun iq Precision?
Juniq Precision supports B2B customers sourcing metal flat washers and other industrial fastening products. We help buyers compare materials, dimensions, standards, and finish options to identify suitable products for their projects.
Multiple Material Choices: Options for general industrial, corrosion-sensitive, and specialized applications.
Specification Support: Assistance with confirming dimensions, standards, and material requirements.
Flexible Sourcing: Standard and customized requirements can be discussed.
Clear Communication: Share your drawings, specifications, or sample requirements for review.
Quotation Support: Provide your required quantity and delivery destination so the order details can be evaluated.
Whether you need carbon steel flat washers for general assembly or stainless steel flat washers for selected demanding environments, contact Jun iq Precision to discuss your requirements.
9. Packaging and Shipping
Metal flat washers can be packed in bulk bags, inner bags, cartons, or other suitable packaging according to order quantity and handling requirements. Customized labeling and packaging can be discussed before order confirmation.
For a quotation, please provide the product material, washer dimensions, applicable standard, surface treatment, quantity, and destination country. Packaging and shipping arrangements will be confirmed according to the order.
10. Frequently Asked Questions
Q1: What are metal flat washers used for?
Metal flat washers are used with bolts and screws to distribute clamping loads, protect bearing surfaces, and provide a stable contact area in fastening assemblies.
Q2: Which materials are available for flat washers?
Common material options include carbon steel, SS304 stainless steel, SS316 stainless steel, brass, copper, and aluminum, subject to availability.
Q3: Which flat washer standards can I request?
Potential options include DIN 125A, DIN 9021, ISO 7089, GB/T 95, GB/T 97.1, and ASME B18.22.1. The correct standard depends on the washer type and required dimensions.
Q4: Can I order stainless steel flat washers?
Yes. SS304 (A2) and SS316 (A4) options can be discussed according to your specifications and application requirements.
Q5: What surface treatments are available?
Possible options include plain finish, black oxide, zinc plating, hot-dip galvanizing, nickel plating, and passivation. Not every treatment is suitable for every material.
Q6: Can you supply customized metal flat washers?
Customized requirements can be discussed. Please provide a drawing or specify the inner diameter, outer diameter, thickness, material, standard, and required quantity.
Q7: How do I choose the correct flat washer size?
Match the washer to the bolt or screw size, then confirm the required inner diameter, outer diameter, thickness, and applicable standard.
Q8: Do flat washers prevent bolts from loosening?
A flat washer primarily distributes load and protects the bearing surface. It should not be treated as a guaranteed locking device. Use an appropriate locking solution if the assembly requires resistance to loosening.
Q9: How can I request a quotation?
Send Jun iq Precision your required material, dimensions, standard, surface treatment, quantity, and destination country. Drawings or reference photos can also help confirm the specification.
11. Request a Quote for Metal Flat Washers
Looking for a reliable source of Metal Flat Washers for Bolt Screw? Jun iq Precision can help you review suitable material and specification options for your fastening application.
Send us your requirements today to discuss product details and request a quotation.
Product: Metal Flat Washers for Bolt Screw
Material: Carbon Steel / SS304 / SS316 / Brass / Copper / Aluminum
Required Size: Inner Diameter × Outer Diameter × Thickness
Standard: DIN / ISO / GB/T / ASME, as applicable
Surface Treatment: Please specify your preference
Quantity: Please advise your order quantity
We welcome inquiries for industrial fastening products and customized sourcing requirements.
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