S-90377A164 0.344" ID x 1.25" OD Oversized Washers
Oversized 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 18-8 stainless steel construction, ideal for harsh industrial environments
- Enhanced durability and wear resistance provided by the black-oxide surface treatment
- Precise fit for 5/16" screws with 0.344" inner diameter ensuring secure fastening
- Optimal load distribution with 1.25" outer diameter reducing surface pressure
- Consistent performance with 0.040-0.060" thickness range providing reliable spacing
- Environmental compliance assurance with RoHS 3 and REACH compliance for global industrial use
- Long-term reliability in inch measurement system applications requiring corrosion-resistant components
Professional Applications & Engineering Value
These Black-Oxide 18-8 Stainless Steel flat washers deliver exceptional engineering value in applications where corrosion resistance and chemical stability are paramount. The combination of 18-8 stainless steel material and black-oxide surface treatment creates a protective barrier against oxidation, moisture, and chemical exposure, making them ideal for industrial fastening in marine, chemical processing, and outdoor equipment applications. The precise 0.344" inner diameter ensures perfect alignment with 5/16" screws, while the generous 1.25" outer diameter provides superior load distribution across joined surfaces. This flat washer design effectively prevents galvanic corrosion and maintains structural integrity in demanding environments where ordinary fasteners would deteriorate rapidly.
Specification Summary & Compliance
This flat washer features inch system dimensions with 0.344" inner diameter, 1.25" outer diameter, and 0.040-0.060" thickness range, specifically designed for use with 5/16" screws. Manufactured from 18-8 stainless steel with black-oxide surface treatment for enhanced protection. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide.
