S-90377A129 0.281" ID x 0.75" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide 18-8 Stainless Steel, ensuring long-term reliability in harsh environments.
• Precise dimensional fit with 0.281" ID and 0.75" OD, providing optimal load distribution and secure fastening for 1/4" screws.
• Enhanced durability from Rockwell B68 hardness, offering excellent resistance to wear and deformation under stress.
• Reliable performance in heavy-duty applications due to consistent thickness (0.060-0.090") and robust material construction.
• Environmental compliance assurance with RoHS 3 and REACH standards, supporting sustainable and safe industrial practices.
• Broad compatibility with inch-system fasteners, simplifying sourcing and integration in various assemblies.
• Cost-effective maintenance by reducing replacement needs through high corrosion and abrasion resistance.

Professional Applications & Engineering Value

This flat washer is engineered to address common industrial challenges such as fastener loosening, surface damage, and corrosion-induced failures. The Black-Oxide 18-8 Stainless Steel material provides a protective layer that significantly enhances corrosion resistance, making it ideal for outdoor, marine, and chemical-exposed environments. With precise 0.281" ID and 0.75" OD dimensions, it ensures even pressure distribution, preventing stress concentration on connected surfaces. This design is critical in heavy-duty applications like machinery assembly, automotive systems, and construction projects, where reliable performance under vibration and load is essential. The Rockwell B68 hardness further supports longevity, reducing downtime and maintenance costs for B2B clients seeking dependable industrial washers.

Specification Summary & Compliance

This flat washer adheres to standard inch system measurements with an internal diameter of 0.281", outer diameter of 0.75", and thickness ranging from 0.060" to 0.090", ensuring precise fit for 1/4" screw sizes. Manufactured from 18-8 Stainless Steel with a Black-Oxide finish, it meets industry expectations for dimensional accuracy and material 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 standards for hazardous substance restrictions.