S-91131A028 Male and Female Leveling Washers

Key Features & Benefits at a Glance

• ±3° misalignment correction compensates for angular deviations, reducing stress on fasteners and preventing joint failure in demanding applications
• Black-oxide steel construction provides superior corrosion resistance and lasting protection in harsh industrial environments
• Rockwell C48 hardness rating ensures exceptional durability and wear resistance under high-load conditions
• Precision-engineered spherical design maintains reliable performance with 0.281" female ID and 0.500" OD for perfect 1/4" screw compatibility
• Full regulatory compliance with RoHS 3 and REACH standards guarantees environmental safety and global market acceptance
• Replacement male washer compatibility offers flexible system integration and simplified maintenance in existing assemblies
• Optimized thickness (0.251"-0.281") provides structural stability while accommodating manufacturing tolerances

Professional Applications & Engineering Value

These spherical washers solve critical alignment challenges in heavy machinery, structural steel connections, and precision equipment assemblies. The black-oxide steel material combined with Rockwell C48 hardness creates a robust solution that withstands vibration, impact, and environmental exposure. The unique spherical interface allows for 3° misalignment correction, eliminating binding issues and distributing load evenly across fastener systems. This engineering advantage is particularly valuable in construction equipment, automotive suspensions, and industrial machinery where perfect alignment is impossible to maintain. The 0.281" ID and 0.500" OD dimensions ensure precise fitment with 1/4" fasteners, while the corrosion-resistant surface treatment extends service life in outdoor or chemically aggressive environments.

Specification Summary & Compliance

Manufactured to exacting dimensional standards with female ID 0.281", male ID 0.257", female OD 0.500", and male OD 0.438" for consistent performance. The Rockwell C48 hardness specification ensures mechanical reliability, while the 0.251"-0.281" thickness range maintains dimensional accuracy. Compliant with RoHS 3 (2015/863/EU) under exemption 6(a)-I for lead as an alloying element in steel and REACH (EC 1907/2006) regulations current as of January 17, 2023, including 233 SVHC substances. Designed specifically for 1/4" screw applications with ±3° maximum angle correction capability.