S-90377A126 0.203" ID x 1" OD Oversized Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from black-oxide coated 18-8 stainless steel, ideal for harsh environments and extending service life
• Precise dimensional fit with 0.203" ID and 1" OD, ensuring reliable alignment and load distribution for No. 10 screws
• Consistent thickness control (0.030-0.050") provides uniform pressure distribution and prevents joint loosening
• Enhanced durability with Rockwell B68 hardness, resisting deformation under load and maintaining fastener integrity
• Broad industrial compliance with RoHS 3 and REACH standards, meeting strict environmental and safety regulations
• Versatile inch system compatibility for seamless integration with existing machinery and North American fastener standards
• Reliable performance in demanding applications due to material strength and controlled manufacturing tolerances

Professional Applications & Engineering Value

These black-oxide 18-8 stainless steel flat washers are engineered to address common industrial challenges such as galvanic corrosion, vibration-induced failure, and environmental degradation. The black-oxide surface treatment enhances the natural corrosion resistance of 18-8 stainless steel, making these flat washers suitable for outdoor, marine, and chemical-exposed settings. Their precise 0.203" ID and 1" OD ensure optimal load spreading for No. 10 screws, reducing stress concentrations and preventing surface damage. This combination of material properties and dimensional accuracy delivers long-term reliability in assembly lines, machinery, and structural applications where corrosion-resistant washers are critical for maintenance-free operation.

Specification Summary & Compliance

This flat washer conforms to standard inch system dimensions with an inner diameter of 0.203", outer diameter of 1", and thickness range of 0.030-0.050". Manufactured from 18-8 stainless steel with a black-oxide finish and Rockwell B68 hardness, it is designed for use with No. 10 screws. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and health safety standards for industrial components.