S-90909A533 5/16"-18 x 1" Stainless Steel Flanged Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh environments and chemical exposure
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance under heavy loads
• Precise thread engagement with Class 3A UNC coarse threads ensuring secure fastening and vibration resistance
• Easy installation and removal with 3/16" hex drive providing positive torque transfer and reducing tool slippage
• Enhanced load distribution through the flanged design, minimizing surface damage and improving joint integrity
• Full threading along the 1" length for maximum grip and adjustable positioning in various material thicknesses
• Regulatory compliance with RoHS 3 and REACH standards, ensuring environmental safety and global market acceptance

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 316 stainless steel rounded head screws deliver exceptional performance where corrosion resistance is critical. The combination of UNC coarse threading and Class 3A fit provides superior vibration resistance in machinery, automotive, and marine applications. The passivated finish enhances surface durability while maintaining the material's inherent corrosion resistance properties. With 70,000 psi tensile strength and Rockwell B70 hardness, these hex drive screws withstand extreme mechanical stress while the flanged design distributes clamping force effectively, preventing surface damage in assembled components. Ideal for chemical processing equipment, offshore installations, and food processing machinery where reliability and compliance with international standards are paramount.

Specification Summary & Compliance

This 5/16"-18 UNC screw features Class 3A thread fit precision with coarse thread spacing, ensuring consistent performance across industrial applications. Manufactured from 316 stainless steel with passivated finish, the fastener maintains dimensional accuracy with 1" length and 0.688" flange diameter. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental safety and chemical restriction adherence for global industrial use.