S-91860A047 0.203" ID x 0.438" 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 17-7 PH stainless steel construction, ideal for harsh industrial environments
- Exceptional mechanical strength with Rockwell C40 hardness for reliable load bearing and vibration resistance
- Precise dimensional fit with 0.203" ID and 0.438" OD ensuring perfect alignment with No. 10 screws
- Optimized load distribution through controlled 0.024-0.038" thickness for even pressure spreading
- Long-term reliability in demanding applications due to material's high stress-corrosion cracking resistance
- Environmental compliance with RoHS 3 and REACH standards for global manufacturing acceptance
- Reduced maintenance needs through stainless steel's inherent durability against wear and degradation
Professional Applications & Engineering Value
These 17-7 PH stainless steel flat washers deliver critical engineering solutions where standard washers fail. The precipitation-hardening stainless steel maintains Rockwell C40 hardness under thermal cycling and corrosive conditions, preventing galling and seizing in high-performance assemblies. The precise 0.203" ID ensures secure seating on No. 10 screws while the 0.438" OD provides optimal surface coverage for load distribution in aerospace, chemical processing, and marine applications. The controlled 0.024-0.038" thickness prevents over-compression while maintaining consistent clamping force, solving common issues of joint loosening and material fatigue in vibration-prone environments.
Specification Summary & Compliance
Manufactured to inch system standards with precise internal diameter (0.203"), outer diameter (0.438"), and thickness range (0.024-0.038"). These flat washers maintain dimensional accuracy for No. 10 screw applications and feature Rockwell C40 hardness for consistent mechanical performance. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures suitability for global industrial supply chains and restricted substance-controlled manufacturing processes.
