S-90133A040 0.29" ID x 0.688" OD Rubber Sealing Washers

Key Features & Benefits at a Glance

• Superior vibration damping with Durometer 55A hardness for reduced equipment wear and noise
• Excellent sealing performance to prevent fluid and dust ingress in industrial environments
• Wide temperature resilience from -20°F to 180°F for stable operation in varying conditions
• Chemical resistance of Neoprene rubber for prolonged durability against oils and solvents
• Precise dimensional fit with 0.29" ID and 0.688" OD for secure 5/16" screw applications
• Regulatory compliance with RoHS 3 and REACH standards for safe, sustainable usage
• Consistent thickness between 0.078-0.108" ensuring reliable pressure distribution

Professional Applications & Engineering Value

This neoprene rubber flat washer addresses critical industrial challenges by combining flexible sealing with robust vibration isolation. Its Durometer 55A hardness provides optimal compression recovery, maintaining seal integrity under dynamic loads while absorbing mechanical shocks in machinery, automotive, and HVAC systems. The black Neoprene material offers inherent resistance to weathering, ozone, and moderate chemicals, extending service life in harsh environments. Engineered for 5/16" screw size applications, it ensures precise fitment to prevent loosening and leakage, making it ideal for assembly lines, electrical enclosures, and plumbing fixtures where temperature fluctuations from -20°F to 180°F are common.

Specification Summary & Compliance

Manufactured to inch system standards with ID 0.29", OD 0.688", and thickness tolerance of 0.078-0.108". The washer conforms to industry-accepted dimensional specifications for flat washers and demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring absence of restricted substances. Material properties include consistent Durometer 55A hardness and validated performance across the specified temperature range.