S-98040A109 17 mm ID x 32 mm OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from black-oxide steel coating, extending service life in harsh industrial environments
• Exceptional load distribution with precise 17mm ID and 32mm OD dimensions, preventing surface damage and loosening
• Enhanced durability with Rockwell 15N80 hardness rating, maintaining structural integrity under heavy loads
• Reliable thickness tolerance (4.5-5.4mm) ensuring consistent performance and secure fastening
• Industry-standard compliance with RoHS 3 and REACH regulations for safe, environmentally responsible usage
• Optimized for M16 screw applications providing perfect fit and vibration resistance in mechanical assemblies
• Heavy-duty construction suitable for demanding industrial applications requiring long-term reliability

Professional Applications & Engineering Value

This M16 flat washer engineered from black-oxide steel addresses critical industrial fastening challenges where corrosion resistance and load distribution are paramount. The 17mm internal diameter precisely accommodates M16 screws while the 32mm outer diameter provides optimal surface contact, preventing embedment and maintaining joint integrity. The black-oxide surface treatment creates a protective barrier against moisture and chemicals, significantly extending service life in manufacturing equipment, structural frameworks, and outdoor applications. With consistent 4.5-5.4mm thickness and Rockwell 15N80 hardness, this metric flat washer delivers reliable performance in heavy machinery, automotive assemblies, and construction projects where vibration resistance and long-term durability are essential engineering requirements.

Specification Summary & Compliance

This heavy-duty flat washer features precise metric dimensions with 17mm internal diameter, 32mm outer diameter, and 4.5-5.4mm thickness range, engineered for M16 screw applications. Manufactured from black-oxide steel with Rockwell 15N80 hardness rating, the product maintains dimensional accuracy for reliable performance. Compliance includes RoHS 3 (2015/863/EU) with exemption 6(a) for lead as an alloying element in steel and full REACH (EC 1907/2006) compliance with 233 SVHC substances monitored as of January 17, 2023, ensuring environmental responsibility and workplace safety standards.