S-91858A203 8-32 x 1 1/2" ASME B18.6.3 Stainless Steel Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction and passivated finish, ideal for harsh industrial environments
• Exceptional mechanical strength delivering 70,000 psi tensile strength and Rockwell B80 hardness for reliable load-bearing performance
• Precision-engineered fit with Class 2A thread tolerance ensuring smooth installation and secure fastening
• Optimized flush mounting featuring standard flat head profile with 82° countersink angle for seamless surface integration
• Enhanced installation efficiency through coarse UNC threading and slotted drive design for quick assembly
• Full-thread engagement along the entire 1½" length providing maximum grip strength in demanding applications
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 8-32 UNC flat head screws deliver critical performance advantages where corrosion resistance and structural integrity are paramount. The 316 Stainless Steel composition with passivated finish provides exceptional protection against chemical exposure and atmospheric corrosion, making them ideal for marine equipment, chemical processing plants, and food-grade applications. The fully threaded design ensures maximum engagement strength across the entire fastener length, while the coarse thread configuration facilitates rapid installation in various materials. With their standard flat head profile and precise 82° countersink angle, these screws create flush surface finishes that eliminate protrusions in machinery assemblies and structural components. The combination of 70,000 psi tensile strength and Rockwell B80 hardness ensures reliable performance under vibration and dynamic loading conditions common in industrial settings.

Specification Summary & Compliance

These flat head screws maintain precise dimensional accuracy with Class 2A thread fit per UNC standards and feature a right-hand thread direction with coarse thread spacing. Manufacturing compliance is verified to ASME B18.6.3 specifications, ensuring consistent quality and interchangeability. Environmental responsibility is demonstrated through full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances. The fastener's dimensional profile includes a 0.312" head diameter and 0.1" head height with standard flat head configuration for optimal countersinking performance.