S-91475A391 0.193" ID x 0.334" OD ASME B18.21.1; MS35338-138 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 corrosion resistance with Black-Oxide 316 Stainless Steel construction, ideal for harsh industrial environments
- Exceptional vibration resistance due to the split lock design, preventing fastener loosening under dynamic loads
- Reliable hardness (Rockwell C35) ensures consistent spring action and long-term locking performance
- Precise dimensional fit with 0.193" ID and 0.334" OD, designed specifically for No. 10 screws
- Compliance with ASME B18.21.1 and MS35338-138 standards guarantees engineering reliability and interchangeability
- Environmental regulation adherence with RoHS 3 and REACH compliance for safe, sustainable industrial use
- Standard split lock washer profile provides easy installation and proven locking mechanism effectiveness
Professional Applications & Engineering Value
This Black-Oxide 316 Stainless Steel split lock washer delivers critical vibration resistance in demanding applications where fastener security is paramount. Engineered with Rockwell C35 hardness, it maintains consistent spring tension to prevent loosening in high-vibration machinery, automotive assemblies, and marine equipment. The black-oxide surface treatment on 316 stainless steel provides an extra layer of corrosion protection, making it suitable for chemical processing, offshore, and outdoor industrial environments. Its standardized split lock washer design ensures reliable performance for No. 10 screw fastening systems, reducing maintenance downtime and enhancing operational safety in heavy-duty lock washer applications.
Specification Summary & Compliance
This split lock washer features precise inch-system dimensions: 0.193" ID, 0.334" OD, and 0.047" thickness, manufactured to ASME B18.21.1 and MS35338-138 specifications. It maintains Rockwell C35 hardness for consistent mechanical performance and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial supply chains.
