S-90313A503 0.156" ID x 0.438" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and extended service life.
• Excellent load distribution and surface protection, minimizing stress on assemblies and preventing component damage.
• Reliable dimensional stability with precise 0.156" ID and 0.438" OD, ensuring consistent fit and performance for No. 6 screws.
• Enhanced durability from Rockwell B68 hardness, offering resistance to wear and deformation under pressure.
• Broad thickness tolerance (0.050-0.080") provides flexibility in assembly while maintaining secure fastening.
• Full regulatory compliance with RoHS 3 and REACH standards, ensuring safety and environmental responsibility in global markets.
• Versatile inch system compatibility, making these flat washers easy to integrate into existing industrial equipment and machinery.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these 18-8 stainless steel flat washers address common challenges like galvanic corrosion, fastener loosening, and uneven load distribution. The corrosion-resistant material and Rockwell B68 hardness ensure longevity in applications such as machinery assembly, electrical enclosures, and outdoor structures, where exposure to moisture, chemicals, or temperature variations is a concern. By providing a reliable barrier and even pressure distribution, these precision washers help prevent surface damage, reduce maintenance frequency, and enhance the overall integrity of fastened joints in No. 6 screw installations, supporting efficient and durable B2B operations.

Specification Summary & Compliance

This flat washer adheres to standard inch measurements with an inner diameter of 0.156", outer diameter of 0.438", and thickness range of 0.050-0.080", designed specifically for No. 6 screw sizes. Manufactured from 18-8 stainless steel with a hardness of Rockwell B68, it ensures consistent performance and dimensional accuracy. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for industrial use without hazardous substances.