S-91781A215 8-32 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 long-lasting performance in harsh environments
• High tensile strength of 80,000 psi ensures reliable fastening under heavy loads and vibration
• Precision flush mounting with 82° countersink angle and standard flat head profile for seamless surface integration
• Easy installation and removal with slotted drive design and coarse thread spacing for efficient assembly
• Consistent thread engagement through Class 2A thread fit and UNC thread type for secure connections
• Partial threading design provides optimal grip strength while reducing material stress concentrations
• Industry compliance assurance meeting ASME B18.6.3 standards and environmental regulations for global applications

Professional Applications & Engineering Value

These 8-32 UNC Flat Head Screws deliver exceptional engineering value through their 18-8 Stainless Steel construction and specialized design features. The passivated finish significantly enhances corrosion resistance, making them ideal for demanding industrial environments where moisture and chemicals are present. The partially threaded configuration with coarse thread spacing provides superior holding power while minimizing stress risers in assembled components. The 82° countersink angle ensures perfect flush mounting in machinery, electrical enclosures, and structural applications where protruding fasteners could interfere with operation or safety. These flat head screws solve critical challenges in precision manufacturing, offering reliable performance in automotive assemblies, industrial equipment maintenance, and marine applications where vibration resistance and long-term durability are paramount.

Specification Summary & Compliance

This 4" length flat head screw features precision Class 2A thread fit with UNC thread type and right-hand thread direction for standardized compatibility. Manufacturing adheres to ASME B18.6.3 specifications ensuring dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting the latest industry standards for hazardous substance restrictions and chemical safety protocols in industrial fastener applications.