S-90940A413 4.5 mm ID x 10 mm OD Plastic Washers
Plastic Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Temperature & Environment Parameters
Installation & Application Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior chemical and impact resistance from polycarbonate material for extended service life in demanding environments
- Precise M4 screw compatibility with 4.5mm ID ensuring secure, vibration-resistant fastening in metric assemblies
- Excellent load distribution with 10mm OD and 0.7-0.9mm thickness to prevent surface damage and loosening
- High-temperature performance maintaining integrity up to 212°F (100°C) for thermal cycling applications
- Optical clarity and electrical insulation ideal for visibility-critical or electronic assemblies requiring non-conductive components
- Consistent mechanical properties with Rockwell R120 hardness providing reliable compression resistance
- Full regulatory compliance meeting RoHS 3 and REACH standards for global industrial use without hazardous substances
Professional Applications & Engineering Value
These clear polycarbonate flat washers deliver critical performance advantages where traditional metal washers fail. The polycarbonate plastic construction eliminates galvanic corrosion risks in mixed-material assemblies while providing essential electrical insulation for electronic enclosures and PCB mounting. The metric M4 sizing (4.5mm ID x 10mm OD) ensures perfect compatibility with standard metric fasteners in automation equipment, medical devices, and food processing machinery. With 212°F temperature resistance and Rockwell R120 hardness, these washers maintain dimensional stability under mechanical stress and thermal cycling, preventing joint failure in precision applications where visibility through components or UV resistance is required.
Specification Summary & Compliance
Manufactured to precise metric dimensions (4.5mm ID, 10mm OD, 0.7-0.9mm thickness) with standard flat washer geometry for M4 screw applications. Material certification includes Rockwell R120 hardness rating and 212°F maximum operating temperature. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to international environmental and safety standards for industrial components.
