[100 PKG] Flat Washers Extra Heavy SAE Medium Carbon Steel Zinc Yellow Made in USA 5/16

Premium extra-heavy flat washers built for the most demanding mechanical and automotive assemblies. Made from SAE medium-carbon steel and finished with a durable zinc yellow coating, these washers deliver reliable performance and long-lasting protection in a compact, affordable package. Sized for 5/16 inch bolts, they are a perfect match for standard hardware and fastener sets. Made in the USA, these washers combine domestic craftsmanship with industrial-strength materials.

Key benefits:

• Extra-heavy durability: thicker profile for improved load distribution and resistance to pull-through in high-stress joints.
• Material: SAE medium-carbon steel provides excellent strength and toughness.
• Finish: Zinc yellow coating offers corrosion resistance in moisture-prone environments.
• Size: 5/16 inch bolt compatibility for quick, accurate replacements.
• Origin: Made in USA with domestic manufacturing standards.

Applications include mechanical assemblies, automotive components, electrical installations, equipment repairs, and any project requiring robust flat washers to distribute load and prevent damage to mating surfaces. For best results, pair these extra-heavy washers with compatible fasteners and clean, flat contact surfaces.