S-91950A046 0.188" ID x 0.438" OD ASME B18.21.1 SAE Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance in harsh environments due to 316 stainless steel composition, ideal for marine, chemical, and outdoor applications.
• Precise dimensional fit with 0.188" inner diameter and 0.438" outer diameter, ensuring reliable load distribution and reduced risk of fastener loosening.
• Compliance with ASME B18.21.1 standards guarantees consistent quality, interchangeability, and performance in demanding industrial settings.
• RoHS 3 and REACH compliance ensures environmental safety and material sustainability, meeting global regulatory requirements for hazardous substances.
• Optimized for No. 8 screw sizes, providing secure fastening and enhanced vibration resistance in assemblies.
• Durable construction with a thickness range of 0.036–0.065", offering long-term reliability without deformation under typical loads.
• Broad industrial applicability across machinery, construction, and automotive sectors, thanks to inch system compatibility and robust material properties.

Professional Applications & Engineering Value

This 316 stainless steel SAE flat washer is engineered to address common industrial challenges, such as galvanic corrosion and mechanical stress in aggressive environments. Its high molybdenum content enhances resistance to chlorides and acids, making it suitable for chemical processing, marine equipment, and food-grade applications where hygiene and durability are critical. The ASME B18.21.1 compliance ensures precise thread engagement and uniform pressure distribution, preventing joint failure and extending the lifespan of No. 8 screw assemblies. By integrating RoHS and REACH compliant materials, it supports sustainable manufacturing while maintaining performance in high-corrosion settings, reducing maintenance costs and downtime.

Specification Summary & Compliance

This washer adheres to ASME B18.21.1 standards for dimensional accuracy, including an inner diameter of 0.188", outer diameter of 0.438", and thickness range of 0.036–0.065". It is manufactured from 316 stainless steel and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability. Designed for use with No. 8 screw sizes in inch-based systems, it meets industrial requirements for corrosion resistance and mechanical reliability.