S-93852A122 1.375" ID x 3" 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, ideal for marine, chemical, and outdoor industrial applications.
• Enhanced load distribution with a large 3" outer diameter, reducing surface pressure and preventing damage to assembled materials.
• Precise fit for 1 1/4" screws with a 1.375" inner diameter, ensuring secure fastening and minimizing loosening under vibration or stress.
• Heavy-duty durability under high-stress conditions, backed by USS flat washer design for reliable performance in demanding setups.
• Compliance with ASME B18.21.1 standards guarantees consistent quality, dimensional accuracy, and interchangeability in industrial assemblies.
• Environmental and safety assurance with RoHS 3 and REACH compliance, supporting sustainable and safe usage across global supply chains.
• Wide industrial applicability in construction, machinery, and piping systems due to robust inch-system measurements and material integrity.

Professional Applications & Engineering Value

These 316 stainless steel USS flat washers are engineered to address common industrial challenges such as corrosion-induced failure and uneven load distribution. The high-grade 316 stainless steel material offers exceptional resistance to pitting and crevice corrosion, making them suitable for aggressive environments like chemical processing plants, marine equipment, and wastewater treatment facilities. With a 1.375" ID and 3" OD, they provide a broad bearing surface that disperses clamping force effectively, protecting soft or fragile materials from indentation and ensuring long-term joint integrity. Compliant with ASME B18.21.1 specifications, these washers deliver reliable performance in heavy-duty industrial applications, including structural bolting, machinery assembly, and pipeline fittings, where precision and durability are critical.

Specification Summary & Compliance

This USS flat washer features precise dimensions with an inner diameter of 1.375", outer diameter of 3", and thickness ranging from 0.136" to 0.192", designed for use with 1 1/4" screws in the inch system. It conforms to the ASME B18.21.1 standard for dimensional and mechanical requirements, ensuring consistent quality. Additionally, the washer is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for hazardous substance restrictions.