S-91434A117 0.344" ID x 0.688" OD ASME B18.21.1 SAE Washers

Key Features & Benefits at a Glance

• Exceptional load distribution with precise 5/16" ID and 0.688" OD dimensions for reliable performance under high-stress conditions
• Superior corrosion protection from the black corrosion-resistant coating, extending service life in harsh industrial environments
• Maximum mechanical strength with Grade 8 classification and Rockwell C38 hardness for heavy-duty applications
• Guaranteed dimensional accuracy through compliance with ASME B18.21.1 standards for consistent fit and function
• Enhanced safety and reliability with thickness ranging from 0.055" to 0.065" for optimal compression and vibration resistance
• Environmental compliance assurance meeting RoHS 3 and REACH regulations for global manufacturing applications
• Optimized for 5/16" fasteners providing perfect mating with corresponding screw sizes in inch system assemblies

Professional Applications & Engineering Value

These Grade 8 SAE flat washers deliver critical engineering solutions for industrial applications where corrosion resistance and structural integrity are paramount. The black corrosion-resistant coated steel construction provides exceptional protection against environmental degradation, while the Rockwell C38 hardness ensures maintained performance under extreme mechanical stress. Engineered to ASME B18.21.1 specifications, these heavy-duty washers prevent bolt loosening, distribute clamping forces evenly, and protect sensitive surfaces in automotive, construction, and heavy machinery applications. The precise 0.688" OD and 5/16" ID dimensions guarantee proper fitment, making them ideal for maintenance, repair, and OEM applications requiring reliable fastener performance in challenging conditions.

Specification Summary & Compliance

Manufactured to exact ASME B18.21.1 standards with dimensional specifications including 0.344" ID, 0.688" OD, and thickness ranging 0.055-0.065". These Grade 8 washers feature Rockwell C38 hardness and are compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The inch system measurement ensures compatibility with standard 5/16" fasteners for seamless integration into existing assemblies.