S-91781A161 6-32 x 2 1/2" 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 with 80,000 psi tensile strength and Rockwell B80 hardness for reliable load-bearing applications
• Precision thread engagement with Class 2A fit and UNC coarse threads ensuring secure fastening and vibration resistance
• Optimized flush mounting with standard 82° countersink angle and flat head design for seamless surface integration
• Controlled thread engagement through partial threading for precise clamping force distribution
• Industry-standard compliance meeting ASME B18.6.3 specifications for consistent quality and interchangeability
• Environmental responsibility with RoHS 3 and REACH compliance for sustainable manufacturing practices

Professional Applications & Engineering Value

These 6-32 UNC flat head screws deliver critical engineering solutions where surface flushness and corrosion resistance are paramount. The 18-8 stainless steel construction with passivated finish provides exceptional protection against chemical exposure and atmospheric corrosion, making them ideal for industrial equipment, marine components, and food processing machinery. The partially threaded design ensures optimal clamping force concentration while preventing thread interference in deep-tapped holes. With coarse thread spacing and Class 2A thread fit, these fasteners resist loosening under vibration and enable quick assembly in production environments. The 82° countersink angle and slotted drive facilitate precise installation in confined spaces, delivering reliable performance in demanding fastening applications where durability and regulatory compliance are essential.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 specifications with Class 2A thread fit tolerance for precision engagement. Features UNC coarse threads (6-32) with right-hand direction and partial threading up to 1½" minimum thread length. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across regulated industries. Mechanical properties include 80,000 psi tensile strength and Rockwell B80 hardness for consistent performance in industrial fastening applications.