S-93852A134 0.5" ID x 1.25" OD ASME B18.21.1 USS Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 stainless steel construction
• Excellent load distribution and surface protection with a large 1.25" outer diameter
• Precise fit for 7/16" screws ensured by the 0.5" inner diameter, preventing loosening
• Enhanced durability and deformation resistance from Rockwell B68 hardness
• Guaranteed dimensional consistency and interchangeability through ASME B18.21.1 compliance
• Safe for regulated industries with full RoHS 3 and REACH environmental compliance
• Reliable long-term performance in heavy-duty applications with consistent 0.064-0.104" thickness

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these 316 stainless steel USS flat washers provide critical protection against galvanic corrosion and chemical exposure in marine, chemical processing, and outdoor applications. The USS designation ensures a robust design capable of handling higher loads than standard washers, while the precise 0.5" ID maintains secure fastening with 7/16" screws without slippage. The combination of Rockwell B68 hardness and controlled thickness variation delivers consistent performance under vibration and thermal cycling, preventing joint failure and reducing maintenance costs in heavy machinery, structural assemblies, and pipeline systems where corrosion resistance and reliability are paramount.

Specification Summary & Compliance

This USS flat washer meets dimensional requirements per ASME B18.21.1 standard with 0.5" inner diameter, 1.25" outer diameter, and thickness range of 0.064-0.104". Manufactured from 316 stainless steel with Rockwell B68 hardness, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability for global industrial supply chains.