S-90474A164 0.188" ID x 0.5" OD ASME B18.21.1 ASME Washers
ASME Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Enhanced corrosion resistance from the black-oxide finish, extending service life in demanding environments.
- Precise dimensional fit for No. 8 screws with a 0.188" inner diameter, ensuring secure fastening and load distribution.
- Reliable load distribution with a 0.5" outer diameter, helping to prevent surface damage and loosening under stress.
- Consistent quality and interchangeability guaranteed by compliance with the ASME B18.21.1 standard.
- Environmental and regulatory compliance with RoHS 3 and REACH, making them suitable for regulated industries.
- Durable steel construction providing strength and longevity for repetitive use in industrial assemblies.
- Optimized thickness range (0.036"-0.045") for a balance of flexibility and structural support in various applications.
Professional Applications & Engineering Value
These black-oxide steel flat washers are engineered to solve common industrial challenges such as galvanic corrosion, surface abrasion, and fastener loosening. The black-oxide surface treatment provides a protective layer that significantly improves corrosion resistance, making these inch washers ideal for machinery, automotive, and outdoor equipment where moisture or chemicals are present. Their precise dimensions, including the 0.188" ID tailored for No. 8 screw applications, ensure even pressure distribution, reducing the risk of joint failure and material fatigue. By adhering to ASME B18.21.1, they deliver consistent performance in high-vibration environments, offering reliable engineering value for maintenance and assembly lines.
Specification Summary & Compliance
This flat washer features an inner diameter of 0.188", outer diameter of 0.5", and thickness ranging from 0.036" to 0.045", designed for use with No. 8 screws. It conforms to the ASME B18.21.1 standard, ensuring precise dimensional tolerances and manufacturing consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety requirements for hazardous substances.
