S-98164A647 8-32 x 7/8" ASME B18.3, ASTM F879 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 316 stainless steel construction, ideal for harsh chemical and marine environments.
• Exceptional tensile strength rated at 70,000 psi for reliable performance in high-stress applications.
• Precise Class 3A thread fit ensures secure, vibration-resistant connections with minimal risk of loosening.
• Enhanced durability with a passivated finish that increases surface hardness and resistance to wear.
• Easy installation and removal using a standard 3/32" hex drive, providing a secure grip and reducing tool slippage.
• Full 7/8" threading offers maximum grip length and holding power across the entire fastener.
• Broad industrial compliance with ASME B18.3, RoHS 3, and REACH standards for safe, regulated use.

Professional Applications & Engineering Value

This 316 stainless steel rounded head screw is engineered to address common industrial challenges, such as corrosion in aggressive environments and the need for reliable, high-strength fastening. Its 8-32 UNC coarse threading and Class 3A fit provide excellent engagement and resistance to vibration, making it ideal for machinery, marine equipment, and chemical processing applications. The passivated finish further enhances longevity by preventing oxidation and surface degradation. With a fully threaded 7/8" length and 70,000 psi tensile strength, it ensures consistent clamping force and durability in heavy-duty assemblies, reducing maintenance and replacement costs.

Specification Summary & Compliance

This screw adheres to Class 3A thread fit for precise dimensional accuracy under the UNC coarse thread standard. Manufacturing follows ASME B18.3 specifications (referencing ASTM F879), ensuring consistent quality and performance. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances and supporting safe industrial use.