S-95481A131 4.3 mm ID x 11.9 mm OD Finishing Washers
Finishing Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Temperature & Environment Parameters
Installation & Application Parameters
Finish & Compliance Parameters
Geometric Parameters
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Key Features & Benefits at a Glance
- Corrosion-resistant performance with durable Nylon Plastic construction, ideal for harsh industrial environments where metal fasteners would degrade.
- Precise 90° countersink angle ensures a flush, professional finish with M4 screws, reducing snagging and improving safety.
- Wide temperature tolerance from -40°F to 180°F maintains integrity and dimensional stability in fluctuating conditions.
- High Rockwell R120 hardness provides excellent wear resistance and long-term reliability under mechanical stress.
- Accurate metric sizing (4.3mm ID, 11.9mm OD) guarantees easy installation and secure fit with standard M4 fasteners.
- Full RoHS 3 and REACH compliance meets stringent environmental and safety regulations for global industrial supply chains.
- Lightweight and non-conductive properties prevent galvanic corrosion and electrical interference in sensitive assemblies.
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these M4 metric countersunk washers solve critical challenges in corrosion-prone or electrically sensitive environments. The Nylon Plastic material eliminates rust and galvanic issues common with metal washers, while the precise 90° countersink angle ensures a seamless fit that prevents protrusion in streamlined assemblies. With a temperature range from -40°F to 180°F, they perform reliably in outdoor equipment, automotive components, and electronic enclosures where thermal cycling occurs. Their Rockwell R120 hardness resists deformation under load, making them a durable choice for vibration-heavy machinery and repeated maintenance cycles.
Specification Summary & Compliance
This countersunk washer features precise dimensions: 4.3mm ID, 11.9mm OD, and 3mm overall height, designed for M4 screw size compatibility with standard metric threading. Manufactured to consistent quality with a 90° countersink angle and Rockwell R120 hardness for reliable performance. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and health standards for industrial fastener applications.
