S-93744A135 0.281" ID x 0.75" OD General Purpose Washers

Key Features & Benefits at a Glance

• Superior electrical and thermal conductivity from high-purity copper material, ensuring efficient performance in demanding electrical systems.
• Excellent corrosion resistance for long-lasting reliability in harsh or humid industrial environments, reducing maintenance and replacement costs.
• Optimized dimensional fit with 0.281" ID and 0.75" OD, designed specifically for 1/4" screws to provide secure, even load distribution.
• Enhanced durability with Rockwell F40 hardness, offering consistent performance under vibration and mechanical stress.
• Full regulatory compliance with RoHS 3 and REACH standards, ensuring safe use in global markets and eco-sensitive applications.
• Wide application versatility in inch-based assembly systems, suitable for electrical grounding, plumbing, and automotive uses.

Professional Applications & Engineering Value

This copper flat washer is engineered to address critical needs in electrical and industrial assemblies where conductivity and environmental resilience are paramount. The pure copper material ensures minimal electrical resistance, making it ideal for grounding applications, bus bars, and power distribution systems. Its natural corrosion resistance prevents degradation in moist or chemically exposed settings, extending service life. The precise 0.281" ID and 0.75" OD dimensions, paired with a 1/4" screw size compatibility, deliver reliable sealing and load spreading, reducing the risk of loosening under dynamic loads. By integrating Rockwell F40 hardness, the washer maintains structural integrity in high-vibration environments like machinery and transformers, offering engineers a dependable, long-term solution for performance-critical installations.

Specification Summary & Compliance

This flat washer adheres to standard inch system measurements with an inner diameter of 0.281", outer diameter of 0.75", and thickness ranging from 0.051" to 0.080". It is manufactured to fit 1/4" screws and features a Rockwell F40 hardness for consistent mechanical properties. The product conforms to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for use in compliant industrial and electrical applications worldwide.