50Pcs Pure Copper Countersunk Screw Washers | CNC Accurate Flat Head Gaskets for Industrial/Automotive/Machinery | M3 - M6 Sizes, 90° Angle, Protection - Degradation

Frustrated by rusted washers that crack under pressure? Our pure copper gaskets solve 3 major pain points: 1) Degradation that weakens joints 2) Vibration-induced loosening 3) Improper load distribution. Engineered for mechanics and industrial users, these CNC-machined washers deliver high-strength durability with precise 90° countersunk angles (M3-M6 sizes). The pure copper construction withstands extreme temperatures (-20°F to 400°F) while minimizing galvanic degradation. Each batch undergoes 12 quality checks to ensure exact thickness (2.05mm-3.5mm) and concentricity. Transform your next repair project with washers that actually endure - get your 50-piece set today.Item Type: Countersunk Screw WasherMaterial: Pure CopperModel Inner Diameter Approx. Outer Diameter Approx. Thickness Approx. Counterbore Angle Single Weight Approx. M3 3.1mm / 0.1in 7.9mm / 0.3in 2.05mm / 0.1in 90° 0.52 g / 0.02 oz M4 4.1mm / 0.2in 9.9mm / 0.4in 2.5mm / 0.1in 90° 0.88 g / 0.03 oz M5 5.1mm / 0.2in 11.9mm / 0.5in 3.2mm / 0.1in 90° 1.63 g / 0.06 oz M6 6.1mm / 0.2in 13.9mm / 0.5in 3.5mm / 0.1in 90° 2.35 g / 0.08 ozPackage List：50 x Gasket

• Top-Grade Pure Copper Construction - These CNC-machined screw washers withstand degradation, humidity, and oxidation for extended performance in harsh environments. Ideal for industrial equipment and outdoor applications.
• Accurate Engineering - Countersunk washers feature exact 90° angles and standardized concentricity (M3-M6 sizes) for optimal bolt alignment. Smoothed edges minimize material damage during installation.
• Enhanced Load Distribution - Copper gaskets create 30% larger bearing surfaces than standard washers, reducing bolt loosening by 60% in high-vibration machinery and automotive systems.
• Universal Compatibility - Lightweight design (0.52g-2.35g per unit) works with wood, metal, and composite materials. Includes 50 washers for multiple repair scenarios.
• Industry Certified - All washers meet industrial fastener standards with exact thickness specifications (2.05mm-3.5mm). Non-conductive copper reduces electrical hazards in sensitive equipment.