S-91131A090 Male and Female Leveling Washers

Key Features & Benefits at a Glance

• 3° angular misalignment compensation ensures proper load distribution and prevents premature fastener failure in uneven mounting applications
• Black-oxide steel construction provides excellent corrosion resistance for extended service life in demanding industrial environments
• Rockwell C25 hardness rating delivers superior mechanical strength and wear resistance under heavy load conditions
• Precision-engineered spherical surfaces maintain consistent contact pressure across mating surfaces for reliable performance
• Standard 3/4" screw size compatibility offers easy integration with existing industrial fastening systems
• Strict dimensional control with 0.781" ID and 1.625" OD ensures perfect fit and alignment in assembly operations
• Comprehensive regulatory compliance meets RoHS 3 and REACH standards for global industrial applications

Professional Applications & Engineering Value

This spherical washer addresses critical alignment challenges in heavy machinery, structural steel connections, and equipment requiring angular adjustment capability. The black-oxide steel surface treatment creates a protective barrier against oxidation and chemical exposure, significantly extending component lifespan in corrosive industrial settings. With its 3° maximum angle correction, this precision component compensates for surface irregularities and mounting inaccuracies that commonly cause stress concentration in bolted joints. The Rockwell C25 hardness ensures dimensional stability under extreme compressive loads, making it ideal for construction equipment, mining machinery, and industrial processing systems where misalignment tolerance and corrosion resistance are paramount for operational safety and reduced maintenance frequency.

Specification Summary & Compliance

Manufactured to precise dimensional specifications including 0.781" inner diameter, 1.625" outer diameter, and 0.360"-0.390" thickness range. The spherical bearing surfaces maintain consistent radius of 2.25" for optimal load distribution. This inch-system washer complies with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) standards regarding substance restrictions, ensuring environmental compliance for industrial distribution and use. The component is engineered for compatibility with standard 3/4" fastening systems and maintains consistent performance across temperature variations and mechanical stress conditions.