S-92908A667 4.3 mm ID x 16 mm OD Finishing Washers
Finishing Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
Geometric Parameters
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Key Features & Benefits at a Glance
- Superior corrosion resistance with black-oxide steel finish, extending service life in harsh industrial environments
- Precise 100° countersink angle ensures flush mounting with M4 screws for clean, professional assemblies
- Optimized dimensional stability with 4.3mm ID and 16mm OD for secure fit and even load distribution
- Enhanced durability from Rockwell 15N80 hardness, maintaining structural integrity under repeated stress
- Compliance with international standards including RoHS 3 and REACH, ensuring safe, regulated use in global markets
- Reliable performance in metric systems, designed for seamless integration with M4 fasteners and metric components
- Consistent thickness (2.7-3.3mm) provides uniform clamping force and reduces installation errors
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these M4 metric countersunk washers address critical challenges in assembly and longevity. The black-oxide steel construction offers exceptional corrosion resistance, preventing premature failure in moist or chemically aggressive environments. With a precise 100° countersink angle, they enable smooth, flush surface finishes in applications like machinery, automotive panels, and electronic enclosures, eliminating protrusions that could compromise safety or aesthetics. The robust Rockwell 15N80 hardness ensures the washer withstands vibrational loads and high torque, reducing maintenance needs. Ideal for metric fastening systems, they provide reliable performance in OEM production and repair operations, enhancing overall equipment reliability.
Specification Summary & Compliance
This washer meets standard metric dimensions with an ID of 4.3mm, OD of 16mm, and thickness range of 2.7-3.3mm, ensuring compatibility with M4 screw sizes. Manufactured to precise tolerances for consistent fit, it adheres to industry norms for countersunk washers. Compliance includes RoHS 3 (2015/863/EU) with exemption 6(a) for lead in steel alloys and REACH (EC 1907/2006) standards, confirming environmental and safety adherence for industrial use.
