S-90130A031 0.355" ID x 0.625" OD Rubber Sealing Washers

Key Features & Benefits at a Glance

• Superior sealing performance with EPDM rubber construction that effectively prevents fluid and gas leakage in industrial assemblies
• Excellent vibration dampening properties that reduce noise and prevent fastener loosening in high-vibration environments
• Wide temperature resistance from -20°F to 212°F (-29°C to 100°C) for reliable performance across diverse operating conditions
• Consistent dimensional accuracy with 0.355" ID and 0.625" OD ensuring perfect fit for 3/8" screw applications
• Optimal material hardness at Durometer 55A providing ideal balance between sealing compression and durability
• Environmental compliance assurance with RoHS 3 (2015/863/EU) certification for safe use in regulated industries
• Enhanced assembly longevity through corrosion-resistant EPDM material that withstands weathering and aging

Professional Applications & Engineering Value

These EPDM rubber flat washers deliver critical engineering solutions where standard metal washers fall short. The ethylene propylene diene monomer rubber composition provides exceptional resistance to water, steam, and weathering, making these industrial sealing washers ideal for outdoor equipment, plumbing systems, and HVAC applications. The precise 0.625" OD and 0.355" ID dimensions ensure proper seating on 3/8" screws while the controlled 0.078-0.108" thickness maintains consistent compression across the sealing surface. Engineers specify these black rubber washers to solve common industrial challenges including thermal expansion compensation, electrical insulation, and corrosion prevention between dissimilar metals.

Specification Summary & Compliance

Manufactured to precise inch system dimensions with 0.355" inner diameter, 0.625" outer diameter, and 0.078-0.108" thickness range. These flat washers are engineered for 3/8" screw size applications with Durometer 55A hardness specification. The washers maintain dimensional stability across the full temperature range from -20°F to 212°F and comply with RoHS 3 (2015/863/EU) environmental regulations for restricted substance control.