S-93012A113 0.406" ID x 0.812" OD ASME B18.21.1 SAE Washers

Key Features & Benefits at a Glance

• Superior corrosion protection from hot-dipped galvanized steel coating, extending service life in harsh environments
• Precise dimensional fit with 0.406" ID and 0.812" OD ensures proper alignment and load distribution for 3/8" fasteners
• Enhanced mechanical strength with Rockwell B72 hardness rating for reliable performance under pressure
• Industry-standard compliance with ASME B18.21.1 specifications guarantees consistent quality and interchangeability
• Environmental responsibility through RoHS 3 compliance, meeting strict hazardous substance restrictions
• Optimized thickness range (0.051-0.080") provides ideal balance between spacing and compression requirements
• SAE inch system compatibility ensures seamless integration with North American industrial equipment and machinery

Professional Applications & Engineering Value

This SAE flat washer delivers exceptional engineering value through its hot-dipped galvanized steel construction, specifically engineered to combat corrosion in demanding industrial settings. The zinc coating provides sacrificial protection that significantly outperforms standard finishes, making it ideal for outdoor equipment, marine applications, and chemical processing facilities where moisture and corrosive elements are prevalent. The precise 3/8" screw size compatibility ensures perfect fitment while the Rockwell B72 hardness maintains structural integrity under vibration and load stress. Engineers specify this washer to prevent fastener loosening, distribute clamping forces evenly, and protect sensitive surfaces from damage - critical considerations in automotive assembly, structural steel connections, and heavy machinery maintenance where reliability cannot be compromised.

Specification Summary & Compliance

This flat washer features dimensional specifications of 0.406" inner diameter, 0.812" outer diameter, and thickness ranging from 0.051" to 0.080". Manufactured to ASME B18.21.1 standards for dimensional accuracy and performance consistency. The product demonstrates full compliance with RoHS 3 (2015/863/EU) environmental directives and is manufactured using hot-dipped galvanized steel material with Rockwell B72 hardness rating, ensuring mechanical properties meet industrial requirements for standard flat washer applications in inch measurement systems.