S-98970A129 0.312" ID x 0.75" OD ASME B18.21.1 USS Washers
USS Washers
Image may differ from product. See technical specification for details.
Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance through hot-dipped galvanized steel construction, extending service life in harsh environments
- Precise dimensional compatibility with 1/4" screws thanks to 0.312" inner diameter and 0.75" outer diameter specifications
- Enhanced load distribution across wider surface area to prevent surface damage and fastener loosening
- Industry-standard compliance with ASME B18.21.1 ensures consistent quality and mechanical reliability
- Environmental regulation adherence with RoHS 3 compliance for safe use in regulated industries
- Durable steel construction maintains structural integrity under mechanical stress and vibration
- Universal inch system compatibility for seamless integration with existing USS-standard fastener systems
Professional Applications & Engineering Value
These USS flat washers deliver exceptional engineering value through their hot-dipped galvanized steel composition, providing a robust barrier against rust and corrosion in demanding industrial environments. The 0.312" ID and 0.75" OD dimensions ensure perfect alignment with 1/4" screws, preventing misalignment and distributing clamping forces evenly to protect sensitive surfaces. Manufactured to ASME B18.21.1 standards, these washers maintain dimensional consistency across production batches, crucial for assembly line efficiency and maintenance operations. Ideal for outdoor structures, marine applications, and industrial machinery where corrosion resistance and reliable performance are paramount, these components solve common failure points in mechanical fastening systems.
Specification Summary & Compliance
This USS flat washer features precise inch-system dimensions with 0.312" inner diameter and 0.75" outer diameter, designed specifically for 1/4" screw applications. The washer maintains standard thickness ranging from 0.051" to 0.080" and conforms to ASME B18.21.1 manufacturing specifications for dimensional accuracy and mechanical properties. The product is fully RoHS 3 (2015/863/EU) compliant, ensuring environmental safety standards are met for industrial and commercial use across global markets.
