S-97654A355 1/4"-20 x 1 1/2" Stainless Steel Flanged Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish for long-term reliability in harsh environments
• Superior load-bearing capability with 70,000 psi tensile strength and Rockwell B70 hardness for demanding industrial applications
• Precise thread engagement through Class 3A thread fit ensuring secure fastening and vibration resistance
• Enhanced installation efficiency with 5/32" hex drive providing positive torque transmission and reduced tool slippage
• Optimized load distribution through flanged design eliminating the need for separate washers while improving clamping force
• Versatile partial threading allowing unthreaded shank sections for precise alignment in assembly operations
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial applications

Professional Applications & Engineering Value

These 1/4-20 UNC rounded head screws deliver critical engineering solutions where corrosion resistance and structural integrity are paramount. The 18-8 stainless steel composition with passivated finish provides exceptional protection against chemical exposure and atmospheric corrosion, making them ideal for marine equipment, food processing machinery, and outdoor industrial installations. The flanged design combined with partial threading offers superior clamping force distribution while preventing cross-threading during assembly. With coarse thread spacing and Class 3A thread fit, these fasteners maintain secure connections in high-vibration environments common in manufacturing equipment, automotive assemblies, and structural frameworks. The hex drive system ensures reliable torque application in confined spaces, reducing installation time while preventing fastener damage.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 3A thread fit per UNC specifications, ensuring tight tolerances for critical applications. The 1/4"-20 thread size with coarse spacing and right-hand direction follows industry-standard threading protocols. These rounded head screws feature a 1-1/2" length with minimum 1" thread length and 0.563" flange diameter for consistent performance. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental safety and material transparency for industrial procurement requirements.