S-90474A161 0.203" ID x 0.406" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Enhanced corrosion resistance from the black-oxide steel finish, extending service life in demanding environments
• Precise dimensional fit with 0.203" ID and 0.406" OD, ensuring reliable performance with No. 10 screws
• Optimized load distribution due to consistent 0.036-0.045" thickness, reducing surface stress and fastener loosening
• Guaranteed mechanical reliability through compliance with ASME B18.21.1 standards for flat washers
• Environmental and workplace safety assured by adherence to RoHS 3 and REACH regulations
• Broad industrial compatibility with inch-system machinery and equipment, facilitating easy integration
• Cost-effective maintenance by preventing galvanic corrosion and protecting assembled components

Professional Applications & Engineering Value

Engineered for industrial and mechanical assemblies, these black-oxide steel flat washers address common challenges such as corrosion-induced failure and uneven load distribution. The black-oxide surface treatment provides a durable barrier against moisture and chemicals, making them ideal for outdoor equipment, automotive subsystems, and machinery exposed to harsh conditions. Their precise 0.203" ID and 0.406" OD dimensions, tailored for No. 10 screw applications, ensure secure fastening and vibration resistance. By conforming to ASME B18.21.1, these washers deliver consistent performance in high-stress environments, reducing maintenance downtime and enhancing the longevity of connected components.

Specification Summary & Compliance

This washer meets ASME B18.21.1 specifications for dimensional accuracy, including inner diameter of 0.203", outer diameter of 0.406", and thickness range of 0.036-0.045". It is manufactured from black-oxide steel and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use in regulated industries.