S-91525A417 0.938" ID x 2.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh chemical and marine environments
• Exceptional durability backed by Rockwell B68 hardness, ensuring long-term performance under heavy loads
• Precise dimensional fit with 0.938" ID designed specifically for 7/8" screws, preventing loosening and misalignment
• Optimal load distribution thanks to the large 2.5" OD, reducing surface pressure and material stress
• Consistent thickness control between 0.170-0.200" for reliable sealing and spacing in assembly applications
• Full regulatory compliance with RoHS 3 and REACH standards, ensuring safe use in regulated industries
• Heavy-duty performance in inch system measurements, compatible with standard industrial equipment and specifications

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 316 stainless steel flat washers provide critical protection against chemical corrosion and stress fatigue. The marine-grade 316 stainless steel composition offers exceptional resistance to chlorides and acidic conditions, making them ideal for offshore platforms, chemical processing plants, and coastal infrastructure. With precise 0.938" ID for 7/8" screws and generous 2.5" OD, these washers effectively distribute clamping forces across wider surfaces, preventing joint failure in heavy machinery, structural steel connections, and pipeline systems. The controlled 0.170-0.200" thickness ensures consistent performance in vibration-prone applications while maintaining proper bolt tension in high-temperature environments where thermal expansion must be accommodated.

Specification Summary & Compliance

This flat washer features inch system dimensions with 2.5" outer diameter, 0.938" inner diameter, and thickness range of 0.170-0.200" specifically engineered for 7/8" screw applications. Manufactured from 316 stainless steel with Rockwell B68 hardness rating, these washers meet industry standards for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, including the latest SVHC requirements as of June 2023, ensuring environmental safety and regulatory acceptance across global markets.