S-91781A201 8-32 x 1 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, ideal for harsh industrial environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for reliable load-bearing performance
• Precision thread engagement through Class 2A thread fit and UNC coarse threads ensuring secure fastening in various materials
• Optimized flush mounting with standard flat head profile and 82° countersink angle for seamless surface integration
• Enhanced installation control via slotted drive design allowing straightforward manual assembly
• Full-length threading providing consistent grip along the entire 1-1/4" length for maximum holding power
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

These 8-32 UNC flat head screws deliver critical performance advantages in demanding industrial applications where corrosion resistance and mechanical reliability are paramount. The combination of 18-8 stainless steel material and passivated surface treatment creates a robust barrier against chemical exposure and atmospheric corrosion, significantly extending service life in manufacturing equipment, marine components, and food processing machinery. The coarse UNC thread form with Class 2A tolerance ensures rapid installation and vibration resistance in softer materials like aluminum housings and plastic assemblies. The fully threaded design maximizes pull-out strength while the standard flat head profile maintains aerodynamic surfaces in automotive and aerospace applications. These slotted drive fasteners provide reliable fastening solutions where electrical conductivity and non-magnetic properties are required.

Specification Summary & Compliance

Manufactured to exacting dimensional standards with Class 2A thread fit and UNC coarse thread profile (8-32 size, 0.164" diameter). Complies with ASME B18.6.3 mechanical specifications and maintains full regulatory compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental directives. The 82° countersink angle conforms to industry standards for flat head fasteners, ensuring proper seating in prepared holes.