S-91771A299 12-24 x 1 1/2" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for reliable load-bearing performance
• Optimized installation efficiency featuring Phillips No. 3 drive and standard 82° countersink angle for flush, secure fastening
• Precision thread engagement with Class 2A thread fit and coarse UNC threading ensuring consistent, vibration-resistant connections
• Full-threaded design providing maximum grip length and uniform stress distribution across the entire fastener
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards (RoHS 3, REACH)
• Right-hand thread direction with standard flat head profile for universal compatibility in industrial assembly applications

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 12-24 UNC flat head screws deliver critical performance advantages where corrosion resistance and structural integrity are paramount. The passivated 18-8 stainless steel construction provides exceptional protection against chemical exposure and atmospheric corrosion, making these fasteners ideal for marine equipment, food processing machinery, and outdoor structural assemblies. The combination of coarse UNC threading and Class 2A thread fit ensures rapid installation with consistent clamping force, while the fully threaded design maximizes connection stability in vibration-prone environments. The standardized 82° countersink angle and Phillips No. 3 drive enable flush mounting in precision-machined components, eliminating protrusions in automated assembly systems.

Specification Summary & Compliance

These 1-1/2" flat head screws maintain precise dimensional accuracy with Class 2A thread fit per UNC standards and 82° countersink angle geometry. Manufacturing compliance is verified under ASME B18.6.3 specifications, ensuring consistent quality and interchangeability. Environmental regulatory adherence includes full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, confirming the absence of restricted substances in industrial applications.