S-91781A630 3/8"-16 x 1 3/4" ASME B18.6.3 Stainless Steel Slotted Flat Head 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
• Exceptional mechanical strength delivering 80,000 PSI tensile strength and Rockwell B80 hardness for demanding applications
• Precision thread engagement with UNC coarse threads and Class 2A fit ensuring reliable fastening and vibration resistance
• Optimized flush mounting featuring standard 82° countersink angle for seamless surface integration
• Full-threaded design providing maximum grip length and load distribution across the entire fastener
• Industry-standard compliance meeting ASME B18.6.3 specifications for dimensional accuracy and performance
• Environmental responsibility with RoHS 3 and REACH compliance for safe usage in regulated industries

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these 3/8"-16 UNC flat head screws solve critical challenges in machinery assembly, structural frameworks, and corrosion-prone environments. The 18-8 stainless steel material combined with passivated finish creates a robust barrier against chemical exposure and atmospheric corrosion, significantly reducing maintenance frequency. The coarse thread profile ensures rapid installation and superior holding power in soft materials and high-vibration settings. With fully threaded construction and standard 82° countersink, these fasteners deliver uniform stress distribution and flush surface mounting - essential for aerospace components, marine equipment, and food processing machinery where protrusions and contamination risks must be eliminated.

Specification Summary & Compliance

This fastener maintains Class 2A thread fit per UNC standards with precise dimensional control including 0.717" head diameter and 1-3/4" length. Manufacturing conforms to ASME B18.6.3 specifications for flat head screw geometry and performance requirements. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to international environmental and safety regulations for hazardous substance restrictions.