Description
The 2-1/2" USS Flat Washer is a high-capacity, general-purpose washer designed for use with 2-1/2-inch diameter bolts, screws, and studs. Manufactured to United States Standard (USS) specifications, it features an oversized outer diameter and a rugged thickness, providing superior load distribution and surface protection in the most demanding fastening environments.
Specifications:
-
Inner Diameter (I.D.): 2-9/16"
-
Outer Diameter (O.D.): 6-1/2"
-
Thickness: 1/2" (nominal)
-
Standard: USS (United States Standard)
-
Material: Typically low carbon steel; also available in stainless steel, brass, or specialty alloys
-
Finish Options: Plain, zinc-plated, hot-dip galvanized, black oxide, or custom corrosion-resistant coatings
Key Features:
-
Expanded Load Distribution: The large outer diameter helps prevent fastener pull-through and protects structural surfaces under heavy clamping forces.
-
Sized for 2-1/2" Fasteners: Clearance hole ensures compatibility with nominal bolt sizes while maintaining ease of installation.
-
USS Standard Fit: Looser tolerances compared to SAE washers, making them ideal for large-scale or misalignment-prone assemblies.
-
Smooth Flat Surface: Ensures consistent torque transfer and structural integrity during high-tension tightening.
-
Corrosion-Resistant Finishes: Available for use in outdoor, marine, and chemically harsh environments.
Applications:
The 2-1/2" USS washer is used in some of the most extreme fastening environments, including:
-
Bridge and heavy structural steelwork
-
Mining, oil, and energy-sector machinery
-
Large-scale infrastructure and utility installations
-
Industrial equipment fabrication and repair
-
OEM applications involving oversized anchor bolts and supports
