S-91475A030 0.314" ID x 0.583" OD ASME B18.21.1; MS35338-140 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 prevents fastener loosening in high-stress applications
- Passivated 18-8 stainless steel construction provides excellent corrosion resistance for harsh environments
- Rockwell C35 hardness rating ensures consistent spring tension and long-term reliability
- Precision 0.314" ID and 0.583" OD dimensions guarantee perfect fit for 5/16" fasteners
- ASME B18.21.1 and MS35338-140 compliance delivers certified quality and interchangeability
- RoHS 3 and REACH compliant meets international environmental and safety standards
- 0.078" thickness optimized for balanced spring action and space-efficient installation
Professional Applications & Engineering Value
This split lock washer provides critical vibration-resistant security for industrial assemblies where thermal cycling and mechanical stress threaten fastener integrity. The passivated 18-8 stainless steel material maintains corrosion resistance while the precisely engineered split design creates continuous spring tension against both bearing surface and fastener head. Engineered to ASME B18.21.1 standards, these inch system washers deliver reliable performance in machinery, automotive, and heavy equipment applications where vibration resistance is paramount. The controlled hardness (Rockwell C35) ensures the washer maintains its spring characteristics without embrittlement, making it ideal for repeated disassembly and reassembly cycles in maintenance operations.
Specification Summary & Compliance
This standard split lock washer features precise dimensional specifications: 0.314" inner diameter, 0.583" outer diameter, and 0.078" thickness, designed specifically for 5/16" screws. Manufactured to meet ASME B18.21.1 and MS35338-140 specifications, ensuring dimensional accuracy and performance reliability. The washer is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications with strict material restrictions.
