USS Flat Washers
USS Flat Washers
USS flat washers are named after the United States Standard and were initially produced for use by the US Navy. These washers are generally larger and thicker than SAE washers, which makes them ideal for applications requiring more load distribution. Their design is particularly beneficial in industrial environments where larger fasteners are commonplace, ensuring a reliable and sturdy assembly.
USS flat washers’ oversized design helps in distributing the load more evenly, which is crucial in protecting the surface of the material being fastened. This even distribution of force also helps prevent damage and wear of both the washer and the assembly. In scenarios involving large fasteners or bolts subject to significant stress, USS flat washers are the preferred choice due to their enhanced size and related characteristics.
- Enhanced Load Distribution: The larger size evenly distributes the force over a larger area to protect surfaces and prevent material damage.
- Vibration Resistance: They are ideal for applications that are exposed to vibration.
- Secure Grip: USS flat washers prevent loosening of fasteners, which is crucial in high-stress environments.
Difference Between USS Flat Washers from SAE Washers in Size and Application
USS flat washers are larger in both outer diameter and thickness compared to SAE washers and also feature a slightly larger inside diameter. This larger size makes them more suitable for industrial applications involving larger fasteners, where a more secure grip and load distribution are required.
Are USS Flat Washers and SAE Washers Available in Through-Hardened Steel?
Yes, they are. While SAE and USS flat washers are most commonly low-carbon steel with plain, zinc-plated, or hot-dipped galvanized finishes, both types are also available in through-hardened carbon steel. Through-hardened carbon steel washers can be used in structural applications, paired with SAE J429 Grade 5 & Grade 8 bolts and ASTM A325 & A490 structural bolts. These hardened washers must be stamped with a manufacturer's mark or grade marking for visual identification.
