S-91081A129 0.312" ID x 0.75" OD USS Washers

Key Features & Benefits at a Glance

• Superior load distribution with 0.75" outer diameter to prevent surface damage and embedment
• Precise fit for 1/4" screws with 0.312" inner diameter ensuring secure fastening alignment
• Durable steel construction providing reliable strength and corrosion resistance for industrial environments
• Consistent thickness control (0.051-0.080") for uniform pressure distribution and vibration resistance
• Full regulatory compliance with RoHS 3 and REACH standards for safe global industrial use
• USS standard design ensuring compatibility with existing inch-system equipment and fasteners
• Cost-effective protection extending equipment life by reducing wear on connected components

Professional Applications & Engineering Value

This USS flat washer delivers critical engineering value in industrial machinery, construction assemblies, and heavy-duty equipment applications. The steel material provides essential strength to handle dynamic loads and prevent fastener loosening under vibration. With its 0.312" ID perfectly matching 1/4" screw sizes, it eliminates misalignment issues during assembly while the 0.75" OD creates an optimal bearing surface to distribute clamping forces evenly. This prevents surface damage to soft materials and reduces stress concentration points, making it ideal for structural connections, machine frames, and equipment maintenance where reliability is paramount.

Specification Summary & Compliance

This USS pattern flat washer features precise inch dimensions with 0.312" inner diameter, 0.75" outer diameter, and thickness ranging 0.051-0.080". Manufactured to USS standards for inch-system fasteners, it ensures proper fit and function with 1/4" screws. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety standards for industrial components.