S-98029A022 0.078" ID x 0.156" OD Oversized Washers

Key Features & Benefits at a Glance

• Enhanced corrosion protection from the black-oxide steel finish, extending service life in humid or demanding industrial environments.
• Precise dimensional fit with a 0.078" inner diameter, ensuring secure seating and optimal load distribution for No. 1 screws.
• Versatile thickness range from 0.005" to 0.024" allows for fine-tuning in assemblies to compensate for tolerances and prevent loosening.
• Reliable surface hardness provided by the steel material, resisting wear and maintaining integrity under repeated fastening.
• Broad regulatory compliance with RoHS 3 and REACH, making these washers suitable for global supply chains and sensitive applications.
• Optimal load bearing due to the 0.156" outer diameter, which helps distribute pressure and protect surfaces from damage.
• Seamless integration with inch-based assembly systems, ensuring compatibility with standard No. 1 screw hardware.

Professional Applications & Engineering Value

This Black-Oxide Steel Flat Washer is engineered to address common challenges in precision assemblies, such as galvanic corrosion, surface abrasion, and fastener loosening under vibration. The black-oxide coating provides a durable, corrosion-resistant barrier, making it ideal for industrial equipment, electronic enclosures, and automotive components exposed to moisture or chemicals. Its 0.078" ID and 0.156" OD ensure a snug fit on No. 1 screws, distributing clamp load evenly to prevent joint failure. With a controlled thickness range of 0.005" to 0.024", it accommodates minor gaps and maintains bolt tension, enhancing the reliability of mechanical fastening systems in critical applications.

Specification Summary & Compliance

This flat washer features inch-system dimensions, including an inner diameter of 0.078", outer diameter of 0.156", and thickness ranging from 0.005" to 0.024", designed for use with No. 1 screw sizes. Manufactured from black-oxide steel, it adheres to standard industrial tolerances for consistent performance. The product is RoHS 3 (2015/863/EU) compliant under exemption 6(a) for lead in steel alloys and REACH (EC 1907/2006) compliant as of January 17, 2023, ensuring it meets stringent environmental and safety regulations for global distribution.