Dottie FWHA516 Washer, 5/16" Through-Hardened Steel Flat Washer

Keep critical assemblies secure with the Dottie 5/16-inch Through-Hardened Steel Flat Washer. Designed for professionals, this Dottie washer increases fastener bearing surface to evenly distribute load and reduce stress on mounting surfaces—protecting bolts, nuts and equipment during high-torque installs. Manufactured from through-hardened alloy steel and finished with zinc plating, the FWHA516 resists deformation and corrosion in demanding environments such as industrial, oil & gas, and outdoor security sites.

Sized for 5/16-inch fasteners and compatible with Grade 5 and Grade 8 bolts, this flat washer provides reliable seating for camera mounts, access control hardware, networking racks and other surveillance or monitoring equipment. The uniform diameter (0.31") and flat profile deliver consistent performance across repetitive installations, making it ideal for MRO teams and large-scale deployments. Packaged in a 100-count bundle, the FWHA516 helps you maintain inventory and minimize installation delays.

Choose the Dottie FWHA516 to protect your fasteners and equipment—order a 100-pack today to support secure, long-lasting installations in security, surveillance, monitoring and industrial projects.

• Distributes clamping force evenly to protect equipment and prevent fastener pull-through
• Through-hardened 5/16-inch steel resists deformation under high torque for long-term reliability
• Zinc-plated, corrosion-resistant finish extends service life in industrial and outdoor installations
• Consistent flat profile ensures secure seating for surveillance, monitoring and security equipment mounts
• Supplied in a convenient 100-pack for MRO stocking, rapid deployment and reduced downtime