Description
The 1/2" USS Flat Washer is a general-purpose spacer and load-distribution component engineered for use with 1/2"-diameter bolts, screws, and studs. Manufactured to United States Standard (USS) dimensions, this flat washer is ideal for applications where larger outer diameters and moderate thicknesses are required to spread load and reduce surface damage.
Specifications:
-
Inner Diameter (I.D.): 9/16"
-
Outer Diameter (O.D.): 1-3/8"
-
Thickness: 1/8" (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 other corrosion-resistant coatings
Features:
-
Wide outer diameter helps distribute fastener load over a larger surface area, minimizing embedment and damage to softer materials
-
Sized for 1/2"-diameter fasteners with a clearance hole to accommodate manufacturing tolerances
-
USS standard sizing provides a looser fit than SAE washers, allowing greater flexibility in general-purpose applications
-
Flat, smooth surface improves torque consistency and reduces friction during tightening
-
Available in corrosion-resistant finishes for indoor, outdoor, or marine use
Applications:
Widely used in structural, mechanical, and general-purpose fastening assemblies, including:
-
Steel fabrication and framing
-
Automotive and trailer assemblies
-
Agricultural and construction equipment
-
Infrastructure and utility installations
-
OEM machinery and repair operations
