S-90909A647 5/16"-18 x 1 1/4" Stainless Steel Flanged Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh chemical and marine environments
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration
• Class 3A thread fit provides precise, secure fastening with minimal risk of loosening
• Flanged design and passivated finish enhance durability and prevent surface degradation
• Hex drive (3/16") allows for easy installation and high torque application
• Fully threaded UNC coarse spacing enables quick assembly and strong holding power
• Compliance with RoHS 3 and REACH standards ensures environmental safety and regulatory acceptance

Professional Applications & Engineering Value

Engineered for demanding industrial settings, this 316 stainless steel rounded head screw excels in applications where corrosion resistance is critical, such as chemical processing, marine equipment, and food manufacturing. The passivated finish provides an extra layer of protection against oxidization, extending service life in humid or acidic conditions. With a Rockwell B70 hardness and 70,000 psi tensile strength, it withstands high stress and repetitive loads without failure. The UNC coarse thread and flanged design distribute clamping force evenly, reducing the risk of material damage and ensuring a secure fit in various substrates, from metals to composites. This screw is a reliable choice for engineers seeking long-term durability and minimal maintenance in aggressive environments.

Specification Summary & Compliance

This product features a 5/16"-18 UNC thread with Class 3A fit for high precision and strength. It is manufactured from 316 stainless steel with a passivated finish, and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety standards for industrial use.