S-91781A846 10-32 x 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 and passivated finish for extended service life in harsh environments
• Exceptional mechanical strength offering 80,000 psi tensile strength and Rockwell B80 hardness for reliable load-bearing applications
• Precise thread engagement with Class 2A thread fit and UNF fine threads ensuring secure fastening and vibration resistance
• Optimized flush mounting thanks to the standard flat head profile and 82° countersink angle for smooth surface finishes
• Easy installation and removal with slotted drive design, compatible with standard tools for efficient maintenance
• Regulatory compliance assurance meeting ASME B18.6.3, RoHS 3, and REACH standards for safe, industry-approved use
• Versatile partial threading on a 4" length providing flexibility for applications requiring both threaded and unthreaded sections

Professional Applications & Engineering Value

These 10-32 UNF flat head screws are engineered to address critical industrial fastening challenges where corrosion resistance, precise alignment, and high tensile strength are paramount. The 18-8 stainless steel construction, enhanced by a passivated finish, provides excellent protection against rust and chemical exposure, making them ideal for marine, chemical processing, and outdoor equipment. The fine thread spacing and Class 2A thread fit ensure tight, secure connections that resist loosening under vibration, crucial for machinery, automotive assemblies, and precision instruments. The partially threaded design allows for controlled clamping force, preventing over-tightening and material damage in sensitive applications like electronic enclosures or aerospace components. With a slotted drive and standard flat head profile, installation is straightforward, reducing assembly time and improving workflow efficiency in manufacturing and maintenance operations.

Specification Summary & Compliance

This screw features a 10-32 UNF thread size with Class 2A thread fit for precise dimensional accuracy, and a fine thread spacing for enhanced holding power. It is manufactured in compliance with ASME B18.6.3 specifications, ensuring consistent quality and performance. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for industrial use.