S-3127N12 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 in harsh environments due to 316 stainless steel construction
- Precise flush mounting with 90° countersink angle for seamless surface finishing
- Exceptional durability and deformation resistance from Rockwell B83 hardness rating
- Reliable dimensional stability with 4.3mm ID ensuring perfect M4 screw compatibility
- Optimized load distribution through 16mm OD design for enhanced joint integrity
- Consistent performance across industrial applications with controlled 2.7-3.3mm thickness
- Global compliance assurance meeting RoHS 3 and REACH environmental standards
Professional Applications & Engineering Value
These M4 countersunk washers deliver critical engineering solutions where surface flushness and corrosion resistance are paramount. The 316 stainless steel material provides exceptional protection against chlorides and chemical exposure, making them ideal for marine, chemical processing, and food industry applications. The precise 90° countersink angle ensures perfect alignment with standard countersunk screw heads, eliminating protrusions that could compromise equipment operation or safety. With metric dimensions specifically engineered for M4 fasteners, these washers prevent loosening under vibration while distributing clamp load effectively across the 16mm outer diameter. The combination of Rockwell B83 hardness and controlled thickness variation ensures consistent performance in high-stress assemblies, reducing maintenance frequency and extending service life in demanding industrial environments.
Specification Summary & Compliance
Manufactured to precise metric standards with 4.3mm inner diameter, 16mm outer diameter, and thickness ranging 2.7-3.3mm. Designed specifically for M4 screw applications with 90° countersink angle compatibility. Material certification includes 316 stainless steel with Rockwell B83 hardness rating. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
