S-90940A113 4.3 mm ID x 9 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
- Exceptional clarity allows for easy visual inspection and alignment during assembly processes
- High impact resistance from polycarbonate material provides reliable protection against cracking and damage
- Corrosion-free performance ensures long-term reliability in humid or chemically exposed environments
- Precise M4 screw compatibility with 4.3mm ID delivers secure fastening and prevents loosening
- Temperature stability up to 212°F maintains dimensional integrity in various operating conditions
- Rockwell R118 hardness offers excellent surface durability and wear resistance
- Regulatory compliance with RoHS 3 and REACH standards ensures safe use in sensitive applications
Professional Applications & Engineering Value
These clear polycarbonate flat washers provide essential solutions for applications requiring both visibility and chemical resistance. The polycarbonate material offers superior impact strength compared to other plastics, making these metric washers ideal for electronic enclosures where component visibility is crucial while maintaining protection against vibration and thermal expansion. The 0.5-1.1mm thickness range accommodates various gap-filling needs in precision assemblies, while the 9mm OD provides adequate bearing surface without excessive material usage. These plastic washers serve as excellent electrical insulators in PCB mounting and prevent galvanic corrosion between dissimilar metals in industrial equipment, extending service life and reducing maintenance costs.
Specification Summary & Compliance
This flat washer features metric dimensions with 4.3mm internal diameter, 9mm outer diameter, and thickness ranging from 0.5-1.1mm, designed specifically for M4 screw applications. Manufactured to standard flat washer specifications with consistent dimensional accuracy. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial and electronic applications worldwide.
