S-91475A020 0.141" ID x 0.25" OD ASME B18.21.1; MS35338-136 Mil. Spec. Split Lock Washers
Mil. Spec. Split Lock Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
Special Type Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance ensures fasteners remain securely locked even under intense dynamic loads and machinery vibrations.
- Exceptional corrosion resistance from Passivated 316 Stainless Steel protects against rust and chemical degradation in harsh industrial environments.
- Reliable spring action and hardness (Rockwell C35) provides consistent locking force and prevents loosening over time.
- Precision-engineered dimensions (0.141" ID, 0.25" OD) guarantee a perfect fit for No. 6 screws, enabling quick installation and uniform load distribution.
- Compliance with ASME B18.21.1 and MS35338-136 standards assures consistent quality, dimensional accuracy, and interchangeability.
- RoHS 3 and REACH compliance makes this washer safe for use in regulated industries and environmentally sensitive applications.
- Durable split lock design offers long service life and dependable performance in heavy-duty and high-stress assemblies.
Professional Applications & Engineering Value
This split lock washer is engineered to solve critical challenges in industrial fastening, such as vibration-induced loosening and corrosion-related failures. Made from passivated 316 stainless steel, it withstands aggressive environments—including exposure to moisture, chemicals, and salt spray—making it ideal for marine, chemical processing, and outdoor equipment. The standard split lock design and Rockwell C35 hardness deliver robust spring tension, maintaining bolt preload in high-vibration applications like motors, pumps, and machinery assemblies. By meeting ASME B18.21.1 and MS35338-136 specifications, it ensures dimensional precision and reliable performance, reducing maintenance needs and enhancing the longevity of critical connections.
Specification Summary & Compliance
This washer features precise inch dimensions: 0.141" ID, 0.25" OD, and 0.031" thickness, designed for No. 6 screw size. It conforms to ASME B18.21.1 and MS35338-136 standards, ensuring accurate thread engagement and consistent performance. The washer is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and sustainable use across global industrial sectors.
