S-92908A576 3.2 mm ID x 12 mm OD Finishing Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to the black-oxide steel finish, extending service life in demanding environments
• Precise flush mounting ensured by the 90° countersink angle for a smooth, professional finish
• Excellent durability and wear resistance provided by the Rockwell 15N80 hardness rating
• Reliable fit for M3 screws with a 3.2mm inner diameter, ensuring secure and stable fastening
• Optimized load distribution with a 12mm outer diameter, reducing surface pressure and material stress
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safe and responsible sourcing
• Consistent dimensional stability with a thickness range of 2.2-2.8mm, providing reliable performance in assembly

Professional Applications & Engineering Value

This M3 metric countersunk washer is engineered to solve critical fastening challenges in industrial settings. The black-oxide steel construction provides a protective layer that significantly enhances corrosion resistance, making it ideal for machinery, automotive assemblies, and outdoor equipment where moisture and chemicals are present. The precise 90° countersink angle ensures a perfectly flush fit with corresponding screw heads, eliminating protrusions that could interfere with moving parts or compromise safety. Its Rockwell 15N80 hardness guarantees that the washer maintains its shape and integrity under high vibrational loads and repeated use, preventing loosening and failure. These features make it a trusted component for professional applications requiring long-term reliability and precise engineering tolerances.

Specification Summary & Compliance

This washer features a Metric system of measurement with an Inner Diameter (ID) of 3.2 mm, Outer Diameter (OD) of 12 mm, and Thickness of 2.2-2.8 mm, designed for M3 screw size. It is manufactured from black-oxide steel with a 90° countersink angle and a hardness of Rockwell 15N80. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and is REACH (EC 1907/2006) compliant as of January 17, 2023, meeting all applicable SVHC requirements.