S-90785A030 0.344" ID x 0.75" OD General Purpose Washers
General Purpose Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior corrosion resistance from 400 Nickel material, ideal for harsh industrial environments
- Precise dimensional fit with 0.344" ID and 0.75" OD ensuring perfect alignment with 5/16" screws
- Exceptional durability with Rockwell C45 hardness for long-lasting performance under heavy loads
- Consistent thickness control (0.047-0.052") for reliable pressure distribution and joint stability
- Full regulatory compliance with RoHS 3 and REACH standards for global industrial applications
- Heavy-duty construction designed to withstand extreme mechanical stress and vibration
- Optimal surface protection preventing galvanic corrosion in multi-material assemblies
Professional Applications & Engineering Value
These 400 Nickel flat washers deliver critical engineering value in demanding applications where corrosion resistance and mechanical strength are paramount. The nickel alloy composition provides exceptional protection against oxidation and chemical degradation, making these washers ideal for marine equipment, chemical processing plants, and outdoor industrial machinery. The precise 0.344" ID ensures perfect fitment with 5/16" screws, eliminating play and maintaining bolt preload in vibrating environments. With Rockwell C45 hardness, these washers resist deformation under high clamping forces, extending service life in heavy-duty assemblies. The controlled 0.75" OD provides optimal load distribution, preventing surface damage to softer materials while maintaining structural integrity in critical fastening systems.
Specification Summary & Compliance
Manufactured to precise inch system dimensions with 0.344" inner diameter and 0.75" outer diameter, these flat washers maintain tight thickness tolerance between 0.047-0.052". The components meet industrial standards for 5/16" screw applications and feature Rockwell C45 hardness for consistent mechanical performance. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and global market acceptance for industrial procurement.
