S-91781A841 10-32 x 2 1/4" 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, ensuring longevity in harsh industrial environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for reliable performance under high-stress conditions
• Precision thread engagement through Class 2A fit and 10-32 UNF fine threads, providing secure fastening with reduced vibration loosening
• Optimal flush mounting with standard 82° countersink angle and flat head design, creating smooth surfaces in assembled components
• Versatile partial threading allowing unthreaded shank sections for precise clamping and alignment in various applications
• Industry-standard compliance meeting ASME B18.6.3 specifications for dimensional accuracy and performance reliability
• Environmental regulation adherence with RoHS 3 and REACH compliance for safe use in regulated industries

Professional Applications & Engineering Value

These 10-32 UNF flat head screws deliver critical engineering solutions where flush surface mounting and corrosion resistance are paramount. The 18-8 stainless steel construction with passivated finish provides exceptional protection against oxidation and chemical exposure, making them ideal for marine, food processing, and chemical industry applications. The fine UNF threading with Class 2A fit ensures precise engagement in tapped holes, reducing the risk of cross-threading while maintaining consistent clamping force. The partially threaded design allows the unthreaded shank to act as a precision pilot in alignment-critical assemblies, while the standard 82° countersink angle ensures proper seating in chamfered holes for clean, professional installations. These features combine to solve common industrial challenges including vibration resistance, environmental durability, and installation efficiency.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 standards, these screws feature Class 2A thread fit for consistent dimensional accuracy and proper mating with Class 2B internal threads. The 10-32 UNF fine thread configuration provides 32 threads per inch with right-hand direction. Critical dimensions include 2 1/4" length with minimum 1 1/2" thread length, 0.362" head diameter, and standard flat head profile. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and regulatory acceptance for global industrial applications.