S-97654A360 1/2"-13 x 2 1/2" Stainless Steel Flanged Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
• High-strength performance delivering 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing capability
• Precise thread engagement with Class 3A fit and UNC coarse threads ensuring secure fastening and vibration resistance
• Enhanced stability and load distribution from the integrated 1.156" flange, reducing surface pressure and preventing pull-through
• Efficient installation and removal with the 5/16" hex drive design providing positive torque transmission
• Versatile partial threading allowing unthreaded shank sections for precise clamp-up in structural applications
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

These 1/2"-13 UNC rounded head screws deliver exceptional engineering value in demanding industrial applications. The 18-8 stainless steel material combined with passivated finish provides outstanding corrosion resistance, making them ideal for chemical processing, marine environments, and food processing equipment where moisture and corrosive agents are present. The flanged design eliminates the need for separate washers while distributing clamp load over a wider area, preventing surface damage and maintaining joint integrity under vibration. With Class 3A thread fit and coarse thread spacing, these screws offer superior engagement in both metals and plastics, reducing the risk of cross-threading during assembly. The partial threading allows for precise unthreaded shank sections that strengthen critical shear planes in structural frameworks and machinery mounting applications.

Specification Summary & Compliance

This rounded head screw features precision 1/2"-13 UNC coarse threads with Class 3A fit tolerance for optimal engagement. The manufacturing complies with standard inch system specifications, delivering consistent dimensional accuracy with a minimum thread length of 2" and overall length of 2-1/2". The product fully conforms to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements, ensuring environmental compliance for industrial applications worldwide.