S-97646A225 3/8"-16 x 1 1/4" 18-8 Stainless Steel Serrated-Flange Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for heavy-duty applications
• Reliable vibration resistance through serrated locking flange that prevents loosening under dynamic loads
• Easy installation and removal with external hex drive design and standard 9/16" head width
• Precise thread engagement with Class 2A UNC coarse threads ensuring consistent fit and reduced cross-threading risk
• Enhanced load distribution from 13/16" flange diameter that minimizes surface pressure and material stress
• Full regulatory compliance meeting RoHS 3 and REACH standards for global industrial use

Professional Applications & Engineering Value

This 3/8"-16 UNC hex head screw delivers critical engineering solutions where vibration resistance and corrosion protection are paramount. The 18-8 stainless steel composition provides excellent durability in chemical processing, marine, and outdoor equipment applications, while the serrated locking flange creates permanent friction locking that eliminates the need for secondary locking components. The coarse UNC thread profile ensures rapid installation in structural steel, machinery frames, and heavy equipment assemblies where Class 2A thread fit guarantees consistent engagement without binding. With full threading along the 1-1/4" length, this industrial-grade fastener maintains clamping force across the entire joint for maximum structural integrity.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit per UNC specifications, ensuring interchangeability and proper engagement. The external hex drive with 9/16" head width provides standard tool compatibility. This flanged hex head screw features a 13/16" diameter flange with serrations for enhanced locking performance. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications requiring restricted substance control.