S-93012A112 0.344" ID x 0.688" OD ASME B18.21.1 SAE Washers
SAE 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 with hot-dipped galvanized steel coating, extending service life in harsh environments
- Enhanced load distribution with precise 0.688" OD and 0.344" ID, reducing surface stress and preventing fastener loosening
- Consistent hardness performance at Rockwell B72, ensuring reliable mechanical strength under repeated loads
- Wide compatibility with 5/16" screw sizes in inch-system assemblies, simplifying inventory and installation
- Strict dimensional control per ASME B18.21.1, guaranteeing interchangeability and fit in standardized applications
- Environmental compliance with RoHS 3 standards, making them safe for regulated industries and global supply chains
- Optimized thickness range (0.051-0.080") for balanced spacing and vibration damping in diverse joint configurations
Professional Applications & Engineering Value
This SAE flat washer in hot-dipped galvanized steel addresses critical challenges in industrial fastening, such as galvanic corrosion and load-induced surface damage. Its robust construction and Rockwell B72 hardness provide lasting protection against deformation, making it ideal for heavy-duty applications in construction, automotive, and machinery assembly. The ASME B18.21.1 compliance ensures dimensional accuracy for seamless integration with 5/16" inch-system screws, while the zinc coating offers a sacrificial layer that resists rust in humid or outdoor settings. Engineers value its ability to maintain bolt tension and distribute pressure evenly, reducing maintenance needs and enhancing the longevity of connected components.
Specification Summary & Compliance
This washer adheres to ASME B18.21.1 specifications, with precise dimensions including 0.344" ID, 0.688" OD, and thickness ranging from 0.051" to 0.080". Manufactured from hot-dipped galvanized steel and hardened to Rockwell B72, it is designed for 5/16" screw sizes in inch-measurement systems. The product is fully RoHS 3 (2015/863/EU) compliant, meeting international environmental and safety standards for restricted substances.
