S-91013A711 0.148" ID x 0.25" OD ASME B18.21.1 Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through Rockwell B87 hardness aluminum construction, preventing fastener loosening in high-stress applications
• Reliable locking performance with standard split design that maintains constant spring tension against both fastener and surface
• Lightweight corrosion resistance from aluminum material, ideal for applications where weight reduction and environmental durability are critical
• Precise dimensional fit with 0.148" ID specifically engineered for No. 6 screws, ensuring proper installation and maximum holding power
• Industry-standard compliance with ASME B18.21.1 specifications, guaranteeing consistent quality and performance across industrial applications
• Environmental responsibility through RoHS 3 and REACH compliance, meeting strict international standards for hazardous substances
• Versatile industrial application with inch measurement system compatibility, suitable for maintenance, manufacturing, and assembly operations

Professional Applications & Engineering Value

This aluminum split lock washer delivers exceptional engineering value in demanding industrial environments where vibration-induced fastener failure is a critical concern. The Rockwell B87 hardness aluminum construction provides optimal spring tension while maintaining the lightweight and corrosion-resistant properties essential for aerospace, electronics, and marine applications. The standard split lock washer design creates continuous opposing force that counters rotational movement, making it particularly valuable for machinery, equipment assembly, and automotive applications where thermal cycling and mechanical stress are prevalent. The precise 0.148" internal diameter ensures perfect compatibility with No. 6 screw sizes, while the 0.25" outer diameter provides sufficient bearing surface for effective load distribution. This combination of material properties and dimensional precision addresses the fundamental challenge of maintaining vibration-resistant fastening integrity without adding significant weight or corrosion susceptibility to the assembly.

Specification Summary & Compliance

This split lock washer features precise dimensional specifications including 0.148" internal diameter, 0.25" outer diameter, and 0.031" thickness, engineered specifically for No. 6 screw applications. Manufactured to ASME B18.21.1 standards, ensuring consistent quality and performance in industrial fastening systems. The product maintains full compliance with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) requirements, including the latest SVHC updates as of June 14, 2023. The aluminum material achieves Rockwell B87 hardness for optimal spring performance and durability in inch measurement system applications.