S-98040A106 10.5 mm ID x 23 mm OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide steel surface treatment, ideal for harsh industrial environments
• Exceptional load distribution due to precise 23mm OD and 4.5-5.4mm thickness, preventing surface damage
• Optimized for M10 screw applications with exact 10.5mm ID ensuring perfect fit and vibration resistance
• Enhanced durability from Rockwell 15N80 hardness, maintaining structural integrity under heavy loads
• Full regulatory compliance with RoHS 3 and REACH standards, ensuring safe and sustainable usage
• Reliable performance in metric systems with standardized dimensions for seamless integration
• Long-term cost efficiency through reduced maintenance and replacement needs in demanding applications

Professional Applications & Engineering Value

This M10 metric flat washer in black-oxide steel delivers critical engineering advantages by addressing common industrial challenges like fastener loosening, surface abrasion, and environmental degradation. The Rockwell 15N80 hardness ensures the washer withstands high clamping forces without deformation, while the black-oxide coating provides a robust barrier against moisture, chemicals, and oxidation—extending service life in automotive, machinery, and construction assemblies. Its precise 10.5mm ID and 23mm OD guarantee uniform pressure distribution, preventing joint failure and reducing stress concentrations. Engineers value this heavy-duty flat washer for maintaining bolt preload in vibrating equipment, offering a reliable, corrosion-resistant solution that upholds assembly integrity under continuous operational stress.

Specification Summary & Compliance

This flat washer adheres to standard metric dimensions with an inner diameter of 10.5mm, outer diameter of 23mm, and thickness range of 4.5-5.4mm, designed specifically for M10 screw sizes. It conforms to general industrial tolerances for flat washers and is manufactured from black-oxide steel with a Rockwell 15N80 hardness rating. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and REACH (EC 1907/2006) regulations as of January 17, 2023, covering 233 SVHCs, ensuring environmental and safety standards are met.