S-90131A629 0.344" ID x 0.688" OD Abrasion-Resistant Cushioning Washers

Key Features & Benefits at a Glance

• Superior vibration dampening and sealing with 70A durometer SBR rubber, ideal for noise reduction and preventing loosening in dynamic applications.
• Enhanced durability and tear resistance due to the internal polyester fiber reinforcement, extending service life in demanding environments.
• Reliable performance in high-temperature conditions, capable of withstanding temperatures up to 170°F without compromising integrity.
• Excellent chemical and environmental resistance provided by the SBR rubber material, protecting assemblies from moisture and many industrial fluids.
• Precise fit for 5/16" screws with an ID of 0.344" and OD of 0.688", ensuring easy installation and optimal load distribution.
• Guaranteed material safety and regulatory compliance, meeting RoHS 3 and REACH standards for use in regulated industries.
• Consistent thickness (0.047-0.077") for uniform compression and a reliable seal across multiple installations.

Professional Applications & Engineering Value

This SBR rubber flat washer is engineered to solve critical challenges in industrial assembly and maintenance. The combination of SBR rubber and polyester fiber filler creates a robust component that excels as a sealing gasket and vibration isolator. It effectively prevents leakage and absorbs shock in machinery, automotive, and plumbing systems, particularly where 5/16" screw fasteners are used. Its black formulation and 70A hardness offer a perfect balance of flexibility and strength, resisting compression set and maintaining a tight seal under high-temperature conditions up to 170°F. This makes it an indispensable part for heavy-duty applications requiring long-term reliability and chemical resistance.

Specification Summary & Compliance

This washer is manufactured to precise inch system dimensions: 0.344" ID, 0.688" OD, and a thickness range of 0.047-0.077". It is designed for use with 5/16" screw size and features a 70A durometer hardness. The product is confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it adheres to strict environmental and safety regulations for industrial components.