S-98029A048 0.344" ID x 0.875" OD Oversized Washers

Key Features & Benefits at a Glance

• Enhanced corrosion resistance from the black-oxide steel finish, extending service life in demanding industrial environments
• Precise dimensional fit with 0.344" ID and 0.875" OD, ensuring reliable seating and load distribution for 5/16" screws
• Optimal thickness range of 0.130-0.150" provides consistent compression and vibration resistance in assembled joints
• Robust steel construction delivers high durability and mechanical strength for long-term reliability in heavy-duty applications
• Full regulatory compliance with RoHS 3 and REACH standards, ensuring safe use in global markets and sensitive industries
• Versatile inch-system compatibility for seamless integration with standard 5/16" fastener assemblies

Professional Applications & Engineering Value

Engineered for industrial reliability, these black-oxide steel flat washers address critical assembly challenges by providing superior corrosion resistance and consistent performance. The precise 0.344" inner diameter and 0.875" outer diameter ensure perfect alignment with 5/16" screw applications, preventing loosening under vibration and distributing clamp load effectively. Made from high-quality steel with a protective black-oxide coating, these industrial washers withstand harsh conditions in machinery, automotive, and construction assemblies. Their compliance with international standards makes them ideal for OEM and MRO applications where durability and regulatory adherence are paramount.

Specification Summary & Compliance

This flat washer features inch-system dimensions: 0.344" ID, 0.875" OD, and 0.130-0.150" thickness, designed specifically for 5/16" screw size applications. Manufactured from black-oxide steel, it complies with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel alloys and meets REACH (EC 1907/2006) requirements as of January 17, 2023, ensuring environmental and safety standards are upheld for industrial use.