S-90377A187 0.812" ID x 2" OD ASME B18.21.1 Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide 18-8 Stainless Steel construction, ideal for harsh industrial environments and outdoor applications.
• Precise dimensional fit with 0.812" ID and 2" OD ensures reliable performance and even load distribution for 3/4" screw assemblies.
• Enhanced durability from the black-oxide surface treatment, providing additional wear resistance and extended service life.
• Industry-standard compliance with ASME B18.21.1 specifications, guaranteeing consistent quality and interchangeability.
• Environmental responsibility with full RoHS 3 and REACH compliance, meeting strict regulatory requirements for safe usage.
• Versatile thickness range (0.122-0.177") accommodates minor variations in assembly while maintaining structural integrity.
• Broad industrial compatibility for machinery, construction, and marine applications where corrosion resistance is critical.

Professional Applications & Engineering Value

These Black-Oxide 18-8 Stainless Steel flat washers address common industrial challenges by combining corrosion resistance with mechanical reliability. The 18-8 stainless steel base material provides inherent strength against chemical exposure and oxidation, while the black-oxide finish adds an extra layer of protection against abrasion and galling. Engineered to ASME B18.21.1 standards, these washers ensure precise fit and load distribution in 3/4" screw applications, preventing loosening under vibration and thermal cycling. Ideal for heavy-duty industrial equipment, marine hardware, and structural assemblies, they deliver long-term performance in demanding environments where fastener failure is not an option.

Specification Summary & Compliance

This flat washer features a 0.812" inner diameter, 2" outer diameter, and thickness range of 0.122-0.177", designed for use with 3/4" screws in inch measurement systems. Manufactured in accordance with ASME B18.21.1 dimensional and material specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage across global industrial markets.