S-92210A468 1"-8 x 3 1/2" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh environments
• Superior thread engagement and vibration resistance due to Class 3A precision thread fit and coarse UNC threading
• High mechanical strength and durability with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Secure, flush installation enabled by the standard flat head profile and 82° countersink angle
• Efficient installation and high torque capability with the 5/8" hex drive, reducing assembly time
• Full-length threading for maximum grip and holding power across the entire 3 1/2" length
• Guaranteed reliability and compliance with ASME B18.3 standards, RoHS 3, and REACH regulations

Professional Applications & Engineering Value

This 1"-8 UNC Flat Head Screw is engineered to solve critical challenges in industrial assembly and machinery. The 18-8 Stainless Steel material, combined with a passivated finish, provides outstanding resistance to corrosion and chemical exposure, making it suitable for marine, chemical processing, and outdoor equipment. The Class 3A thread fit and coarse UNC threading ensure a tight, reliable connection that resists loosening under vibration, which is vital for heavy machinery, structural frameworks, and automotive applications. The 82° countersink angle and flat head design allow for a smooth, flush surface finish, preventing snagging and improving safety in high-traffic areas. With a 70,000 psi tensile strength and fully threaded shank, it delivers consistent performance in high-stress environments, reducing the risk of fastener failure and maintenance downtime.

Specification Summary & Compliance

This screw features a 1"-8 UNC coarse thread with Class 3A thread fit for precise dimensional accuracy and superior engagement. It is manufactured in compliance with ASME B18.3 specifications, ensuring consistent quality and interchangeability. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial use.