S-98035A103 5.3 mm ID x 11 mm OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide steel coating, extending service life in harsh industrial environments
• Precise dimensional accuracy with 5.3mm ID and 11mm OD ensuring perfect fit for M5 screws in metric assemblies
• Exceptional surface hardness rated at Rockwell 15N80 for reduced wear and deformation under load
• Optimized load distribution with 1.5-2.4mm thickness range to prevent surface damage and loosening
• Full regulatory compliance with RoHS 3 and REACH standards for safe use in global industrial supply chains
• Enhanced durability through hardened steel construction, maintaining performance in high-vibration applications
• Universal metric compatibility designed for seamless integration with standard M5 fastener systems

Professional Applications & Engineering Value

These M5 metric flat washers deliver critical engineering value by solving common industrial fastening challenges. The black-oxide steel construction provides superior corrosion protection in manufacturing environments where moisture, chemicals, or outdoor exposure threaten fastener integrity. With Rockwell 15N80 hardness, these washers maintain dimensional stability under sustained clamping pressure, preventing embedding in softer materials. The precise 5.3mm ID ensures secure seating on M5 screws without play, while the 11mm OD distributes load effectively across joined surfaces. Ideal for industrial machinery, automotive assemblies, and electrical enclosures, these washers prevent joint failure while meeting stringent RoHS 3 and REACH compliance requirements for modern manufacturing.

Specification Summary & Compliance

Manufactured to precise metric dimensions with 5.3mm inner diameter, 11mm outer diameter, and 1.5-2.4mm thickness range for M5 screw applications. Constructed from hardened steel with black-oxide surface treatment and Rockwell 15N80 hardness rating. Fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as steel alloying element and REACH (EC 1907/2006) regulations updated January 17, 2023. Meets standard industrial specifications for metric flat washers in mechanical fastening systems.