S-90909A215 1/2"-13 x 1 1/2" Stainless Steel Flanged Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance for extended service life in harsh environments, thanks to 316 stainless steel construction with passivated finish
• Maximum holding power and vibration resistance achieved through fully threaded Class 3A coarse UNC threads ensuring precise fit
• Enhanced load distribution from the integrated flange design, eliminating the need for separate washers
• Secure, high-torque installation enabled by the 5/16" hex drive that prevents cam-out and tool slippage
• Reliable mechanical performance with 70,000 psi tensile strength and Rockwell B70 hardness for demanding applications
• Streamlined, low-profile assembly from the rounded button head design that reduces snagging risks
• Environmental and regulatory compliance meeting RoHS 3 and REACH standards for safe, sustainable use

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 316 stainless steel flanged button head screws deliver exceptional performance where corrosion resistance and mechanical reliability are critical. The Class 3A thread fit and coarse UNC threading provide superior engagement in metals and plastics, resisting loosening under vibration while the fully threaded design ensures consistent clamping force across the entire 1-1/2" length. The integrated flange distributes pressure over a wider area, preventing surface damage and simplifying assembly in machinery, marine equipment, chemical processing systems, and structural frameworks. Combined with a passivated finish that enhances surface durability, these hex drive screws offer a robust fastening solution that maintains integrity in high-stress, corrosive applications.

Specification Summary & Compliance

This 1/2"-13 UNC screw features precision Class 3A thread fit with coarse thread spacing and right-hand threading, manufactured to exact dimensional standards. The 316 stainless steel material and passivated finish ensure consistent performance, backed by 70,000 psi tensile strength and Rockwell B70 hardness. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms adherence to environmental and safety standards for industrial use.