Washers
Washers are thin, flat circular discs used under nuts, bolts, or screws to distribute load, reduce wear, prevent leakage, and provide locking functionality. They come in various types tailored for specific applications like load distribution, vibration resistance, or electrical insulation.
| Parameter | Specification |
|---|---|
Product Type |
Washers (Flat, Spring, Lock, Fender, etc.) |
Size Range |
M1.6 to M100 and larger (varies by type) |
Material Options |
Stainless Steel, Carbon Steel, Brass, Nylon, Aluminum |
Standards |
ISO 7089, DIN 125, ASME B18.21.1, ASTM F436, BS 4320 |
Surface Finish |
Plain, Zinc Plated, Hot-dip Galvanized, Black Oxide, Nickel Plated |
Industrial Applications
Washers are widely used in:
- Electrical panels and assemblies: Provide load distribution and prevent surface damage.
- Automotive industry: Ensure secure fastening with vibration resistance in engines and frames.
- Construction and steelwork: Maintain joint integrity and prevent corrosion in structural bolts.
- Machinery and equipment: Provide spring tension, locking, or shielding in moving parts.
- Consumer products and furniture: Used for assembly, spacing, and surface protection.
Product Description
Washers serve as essential accessories in bolted joints, improving fastening performance and durability. Flat washers distribute load evenly and prevent damage to surfaces. Spring washers add tension to resist loosening from vibrations. Lock washers have features such as teeth or splits to prevent nut rotation. Other specialized washers like fender washers provide larger surface areas, while shoulder washers insulate and guide fasteners. Materials and finishes vary to protect against corrosion, electrical conductivity, or mechanical wear, making washers adaptable across virtually all industries.
Product specifications
- Types of Washers:
- Flat Washers: Load distribution and surface protection
- Spring Washers: Provide preload and vibration resistance
- Lock Washers: Prevent fastener loosening with teeth or split designs
- Fender Washers: Large outer diameter for increased bearing area
- Shoulder Washers: Insulate and guide fasteners
- Size Range: Various sizes compatible with metric and imperial fasteners (e.g., M1.6 to M100)
- Material Options: Stainless steel, carbon steel, brass, aluminum, nylon, other polymers
- Standards and Dimensions:
- ISO 7089, DIN 125 for flat washers
- ASME B18.21.1 for hardened washers
- ASTM F436 for structural hardened washers
- BS 4320, JIS standards for various types and material specifics
- Surface Finishes: Plain, zinc plated, hot-dip galvanized, black oxide, nickel plated, anodized (for aluminum)
- Mechanical Properties: Hardness and tensile strength vary with material and type, with hardened washers offering high load capacity
- Operating Temperature: Typically -50°C to +400°C depending on material and coating
- Corrosion Resistance: Enhanced by stainless steel and protective coatings suitable for outdoor and harsh environments
- Applications: Used to improve load distribution, prevent loosening, insulate, seal, and protect surfaces in fastening assemblies
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