S-98029A028 0.344" ID x 0.625" OD Oversized Washers
Oversized Washers
Image may differ from product. See technical specification for details.
Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance from the black-oxide steel finish, extending service life in harsh environments
- Precise dimensional fit with 0.344" ID and 0.625" OD, ensuring reliable seating and load distribution for 5/16" screws
- Consistent thickness range (0.079-0.098") provides uniform pressure distribution and vibration resistance
- Full regulatory compliance with RoHS 3 and REACH standards, meeting global environmental and safety requirements
- Durable steel construction offers excellent strength and longevity for demanding industrial applications
- Inch system compatibility ensures seamless integration with existing North American equipment and fasteners
Professional Applications & Engineering Value
This black-oxide steel flat washer delivers critical engineering value through its corrosion-resistant properties and precise dimensional control. The black-oxide surface treatment creates a protective barrier against moisture and chemical exposure, significantly reducing failure risks in industrial environments where rust compromises fastener integrity. With its optimized 0.344" inner diameter and 0.625" outer diameter, this 5/16" flat washer ensures perfect alignment and maximum bearing surface contact, preventing joint loosening under vibration and thermal cycling. The consistent thickness range maintains uniform clamping force across assembly points, making it ideal for machinery, automotive, and construction applications where reliability cannot be compromised.
Specification Summary & Compliance
This flat washer features standard inch dimensions with 0.344" ID, 0.625" OD, and thickness ranging 0.079-0.098" for 5/16" screw size applications. Manufactured from black-oxide steel for enhanced durability, the product maintains dimensional accuracy suitable for general industrial use. Compliance includes RoHS 3 (2015/863/EU) with exemption 6(a) for lead as an alloying element in steel and full REACH (EC 1907/2006) compliance with the latest SVHC list (01/17/2023, 233 SVHC), ensuring adherence to international environmental and safety regulations.
