S-91475A377 0.088" ID x 0.172" OD ASME B18.21.1; MS35338-134 Mil. Spec. Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress environments, ensuring long-term assembly integrity.
• Exceptional corrosion resistance from Black-Oxide 316 Stainless Steel, ideal for harsh or outdoor industrial applications.
• Precision fit for No. 2 screws with a 0.088" ID and 0.172" OD, providing reliable performance and easy installation.
• Enhanced durability and spring action from Rockwell C35 hardness, maintaining clamping force under dynamic loads.
• Compliance with ASME B18.21.1 and MS35338-134 standards guarantees consistent quality and interchangeability.
• RoHS 3 and REACH compliance ensures environmental safety and meets global regulatory requirements for industrial use.
• Standard split lock design offers cost-effective and widely compatible vibration-proofing for various assemblies.

Professional Applications & Engineering Value

This split lock washer is engineered to solve critical vibration-induced loosening in industrial equipment, machinery, and automotive systems. The Black-Oxide 316 Stainless Steel construction provides excellent resistance to corrosion and oxidation, making it suitable for demanding environments like marine, chemical processing, and outdoor infrastructure. Its standard split lock design and precise dimensions (0.088" ID, 0.172" OD) ensure a secure fit for No. 2 screw applications, reducing maintenance needs and preventing costly downtime. By meeting ASME B18.21.1 and MS35338-134 specifications, it delivers reliable performance in assemblies where safety and longevity are paramount, such as electrical enclosures, pumps, and heavy-duty fastening systems.

Specification Summary & Compliance

This washer features an internal diameter of 0.088", outer diameter of 0.172", and thickness of 0.020", designed for use with No. 2 screws in the inch measurement system. It conforms to ASME B18.21.1 and MS35338-134 standards, ensuring dimensional accuracy and functional reliability. The material is Black-Oxide 316 Stainless Steel with a hardness of Rockwell C35, and it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting sustainable and safe industrial practices.