304 Stainless Steel Countersunk Fisheye Concave Washers 100pcs

Upgrade your fastening projects with these HUXUAN 304 Stainless Steel Bowl-Type Conical (Fish Eye) Washers — precision-forged concave-convex countersunk gaskets engineered for even load distribution and long-lasting performance. Whether you're tackling industrial assembly, construction work, furniture installation, or home DIY repairs, these washers deliver professional-grade reliability in every application. Made in Mainland China.

Why Choose These Concave Countersunk Washers?

• Superior Corrosion & Rust Resistance: Crafted from high-grade 304 stainless steel, these washers effectively resist moisture, oxidation, and mild chemical exposure — ideal for outdoor, humid, or coastal environments.
• Even Pressure Dispersion: Precision cold-forging creates a true concave profile that evenly distributes bolt and screw load across the contact surface, preventing fasteners from embedding into soft materials and protecting workpiece surfaces from dents.
• High Tensile Structural Strength: Solid one-piece forged construction with a reinforced edge design meets heavy-duty industrial and construction fastening demands with ease.
• Burr-Free Safe Installation: High-precision stamping and mirror-polishing produce smooth, burr-free rounded edges — no risk of scratching work surfaces or hands during installation.
• Universal Wide Compatibility: Standardized inner diameter fits most common screws, bolts, and rivets on the market — perfect for professional trades and everyday DIY use alike.

Product Specifications

Applications

These versatile conical washers are suited for a wide range of uses:

• Industrial equipment assembly
• Construction & structural fastening projects
• Furniture manufacturing & installation
• Home DIY repairs & renovations
• Electrical appliance assembly
• Automotive maintenance & fabrication

Important Notes

• Photos are for reference only and may not reflect actual size — please refer to the size details in the description.
• Minor measurement differences may occur due to manual measuring methods.
• Actual color may vary slightly from images due to monitor calibration differences.

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Learn more: OSHA guidance on hand and power tools

Frequently Asked Questions

Q: What makes 304 stainless steel countersunk washers better than standard flat washers?

A: The bowl-type concave-convex (fish eye) profile of these countersunk washers allows the bolt or screw head to sit flush or recessed, distributing load more evenly over the contact area. This prevents fastener embedding into softer surfaces and reduces surface damage — advantages that standard flat washers cannot offer in countersunk applications.

Q: Are these conical washers suitable for outdoor or high-moisture environments?

A: Yes. These washers are made from 304-grade stainless steel, which offers excellent resistance to rust, oxidation, and mild chemical corrosion. They are well-suited for outdoor construction, coastal environments, plumbing fixtures, and any application where moisture exposure is a concern.

Q: What screw and bolt sizes are these fisheye washers compatible with?

A: These concave washers feature a standardized universal inner diameter designed to fit most common screws, bolts, and rivets available on the market. For precise size compatibility, please refer to the product images and size chart for the specific inner and outer diameter measurements.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.