S-91013A727 0.385" ID x 0.68" OD ASME B18.21.1 Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance thanks to Rockwell B87 hardness aluminum construction that maintains locking force under dynamic loads
• Precise fit for 3/8" screw applications with 0.385" ID and 0.68" OD dimensions ensuring optimal contact and distribution of load
• Enhanced durability in corrosive environments through aluminum material properties that resist oxidation and degradation
• Reliable spring action performance from the standard split lock design that compensates for loosening due to thermal expansion or vibration
• Industry-standard compliance assurance meeting ASME B18.21.1 specifications for consistent quality and interchangeability
• Environmental regulatory compliance with RoHS 3 and REACH standards for safe use in global industrial applications
• Lightweight yet robust construction combining aluminum's weight advantages with Rockwell B87 hardness for demanding assembly requirements

Professional Applications & Engineering Value

This aluminum split lock washer delivers critical vibration resistance in industrial assemblies where 3/8" screw fastening is subjected to dynamic loads and thermal cycling. The Rockwell B87 hardness aluminum construction provides optimal spring tension that maintains clamping force while resisting deformation under stress. Unlike standard steel washers, the aluminum material offers excellent corrosion resistance without sacrificing mechanical performance, making it ideal for electrical enclosures, aerospace components, and marine equipment where weight reduction and environmental factors are concerns. The split lock washer standard design ensures consistent performance across temperature variations, preventing joint failure in critical applications. Engineered to ASME B18.21.1 specifications, this washer provides reliable vibration resistance while meeting strict dimensional tolerances for seamless integration into existing assembly processes.

Specification Summary & Compliance

This split lock washer features precise inch dimensions with 0.385" ID and 0.68" OD, manufactured to ASME B18.21.1 standards for dimensional accuracy and performance consistency. The aluminum construction with Rockwell B87 hardness ensures mechanical properties suitable for industrial applications. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, this washer meets international environmental and safety standards for hazardous substance restrictions. Designed specifically for 3/8" screw applications, it maintains proper thread engagement and locking action across temperature variations and vibration conditions.