S-91475A328 0.502" ID x 0.869" OD ASME B18.21.1; MS35338-48 Mil. Spec. Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress applications
• Enhanced corrosion protection from zinc yellow-chromate plating extends service life in harsh environments
• Optimized for 1/2" screws with precise 0.502" ID for perfect fit and maximum locking force
• Exceptional durability with Rockwell C38 hardness maintaining performance under repeated loading
• Industry-standard compliance ensures reliable performance meeting ASME B18.21.1 and MS35338-48 specifications
• Heavy-duty construction with 0.869" OD and 0.125" thickness for superior load distribution
• Split lock design provides continuous spring action maintaining constant tension on fasteners

Professional Applications & Engineering Value

This split lock washer delivers critical vibration resistance in demanding industrial applications where fastener security is paramount. Engineered from zinc yellow-chromate plated steel, it provides exceptional corrosion resistance for machinery operating in humid or chemically aggressive environments. The standard split lock design creates continuous spring tension that compensates for thermal expansion, vibration-induced loosening, and material relaxation. With precise dimensions (0.502" ID, 0.869" OD) specifically designed for 1/2" screws, this washer ensures optimal contact pressure distribution while the Rockwell C38 hardness maintains structural integrity under cyclic loading conditions. Ideal for heavy equipment, automotive assemblies, and industrial machinery where reliable vibration-resistant fastening solutions are essential for operational safety and reduced maintenance intervals.

Specification Summary & Compliance

This split lock washer features precise dimensional tolerances with 0.502" inner diameter, 0.869" outer diameter, and 0.125" thickness specifically engineered for 1/2" fasteners. Manufactured to meet ASME B18.21.1 standards and military specification MS35338-48, ensuring consistent quality and performance in inch system applications. The zinc yellow-chromate plated steel construction provides superior corrosion resistance while maintaining Rockwell C38 hardness for reliable locking performance. Compliant with industry standards for mechanical properties and dimensional requirements, making it suitable for critical applications requiring certified components.