S-91781A265 10-24 x 5" 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 for extended service life in harsh environments
• Exceptional mechanical strength offering 80,000 psi tensile strength and Rockwell B80 hardness for reliable heavy-duty applications
• Precise flush mounting with standard 82° countersink angle and flat head design for seamless surface integration
• Optimized thread engagement through Class 2A thread fit and coarse UNC threading ensuring secure fastening
• Versatile partial threading allowing unthreaded shank sections for enhanced shear resistance in specific assemblies
• Broad regulatory compliance meeting ASME B18.6.3 specifications while being RoHS 3 and REACH compliant
• Slotted drive compatibility providing universal tool access for installation and maintenance operations

Professional Applications & Engineering Value

Engineered for demanding industrial fastening scenarios, these 10-24 UNC flat head screws address critical challenges in machinery assembly, structural frameworks, and equipment manufacturing. The 18-8 Stainless Steel composition combined with passivated surface treatment creates a robust barrier against chemical exposure and atmospheric corrosion, significantly reducing maintenance frequency in processing plants and outdoor installations. The partially threaded design with coarse UNC threads provides optimal clamping force distribution while preventing thread stripping in softer materials. With their 82° countersink angle and flat head profile, these screws deliver flush surface finishes essential for aerodynamic components, conveyor systems, and safety-critical assemblies where protrusions must be eliminated. The 5-inch length and right-hand threading make them particularly valuable for deep-section fastening in construction equipment, transportation infrastructure, and heavy machinery where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

These flat head screws maintain precise Class 2A thread fit tolerances per UNC thread standards with a thread size of 10-24 and minimum thread length of 1½ inches. Manufacturing adheres to ASME B18.6.3 specifications governing dimensional accuracy and mechanical properties. The products are certified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental responsibility and regulatory acceptance across global markets. The Rockwell B80 hardness and 80,000 psi tensile strength validate consistent performance under demanding load conditions.