S-91475A029 0.252" ID x 0.487" OD ASME B18.21.1; MS35338-139 Mil. Spec. Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress applications
• Exceptional corrosion resistance with passivated 316 stainless steel construction for harsh environments
• Precise dimensional fit with 0.252" ID specifically engineered for 1/4" screw applications
• Enhanced durability with Rockwell C35 hardness rating for long service life
• Industry-standard compliance meeting ASME B18.21.1 and MS35338-139 specifications
• Environmental regulation compliance with RoHS 3 and REACH standards
• Reliable spring action from standard split lock design maintains constant tension

Professional Applications & Engineering Value

This passivated 316 stainless steel split lock washer delivers critical vibration resistance in demanding industrial environments where fastener security is paramount. The split lock design creates continuous spring tension that compensates for thermal expansion, vibration, and dynamic loading conditions. Engineered specifically for 1/4" screw applications, the precise 0.252" ID ensures optimal fit and performance in machinery, equipment assembly, and structural applications. The passivated surface treatment on 316 stainless steel provides superior corrosion resistance against chemicals, moisture, and extreme temperatures, making it ideal for marine, chemical processing, and outdoor industrial applications where reliability cannot be compromised.

Specification Summary & Compliance

This split lock washer features precise inch system dimensions with 0.252" inner diameter, 0.487" outer diameter, and 0.062" thickness. Manufactured to ASME B18.21.1 and MS35338-139 specifications, ensuring consistent quality and performance. The component maintains Rockwell C35 hardness for optimal spring properties and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards for environmental safety and regulatory requirements.