S-5909K991 0.5" ID x 15/16" OD Washers for Needle-Roller Thrust Bearings

Key Features & Benefits at a Glance

• Precision internal diameter fit with 0.002" to 0.012" tolerance ensures secure seating on 1/2" shafts, reducing vibration and misalignment risks.
• Durable steel construction provides excellent load distribution and resistance to deformation under heavy mechanical stress.
• Optimized 15/16" outer diameter offers a larger bearing surface to prevent fastener embedment and protect assembled components.
• Consistent 0.095" thickness with tight tolerance maintains uniform pressure distribution, enhancing joint integrity in repetitive applications.
• Full RoHS 3 and REACH compliance guarantees safe use in regulated environments, supporting global supply chain requirements.
• Inch-system standardization ensures compatibility with existing industrial equipment and simplifies replacement part sourcing.
• Reliable performance in demanding conditions due to precise dimensional control, reducing maintenance needs and downtime.

Professional Applications & Engineering Value

This precision steel washer is engineered to address common assembly challenges in machinery, automotive, and heavy equipment sectors. Its exact 0.5" ID with controlled tolerance minimizes play on 1/2" shaft applications, crucial for maintaining alignment in rotating systems and reducing wear on connected parts. The 15/16" OD and uniform thickness provide stable support, distributing clamp load effectively to prevent surface damage and bolt loosening under dynamic loads. Made from robust steel material, it withstands high-stress environments while the RoHS 3 and REACH compliance ensures suitability for electronics, industrial machinery, and export-focused projects, delivering long-term reliability and regulatory peace of mind.

Specification Summary & Compliance

This washer adheres to inch-based dimensional standards with an ID of 0.5" (tolerance: 0.002" to 0.012"), OD of 15/16" (tolerance: -0.03" to -0.01"), and thickness of 0.095" (tolerance: -0.003" to 0). It is designed for use with 1/2" shaft diameters and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for industrial and commercial applications requiring environmental and safety conformity.