S-91781A256 10-24 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 for extended service life in harsh environments
• High-strength performance delivering 80,000 psi tensile strength and Rockwell B80 hardness for reliable load-bearing applications
• Precision threading with Class 2A fit and UNC coarse thread profile ensuring secure fastening and vibration resistance
• Optimal flush mounting featuring standard 82° countersink angle and flat head design for seamless surface integration
• Controlled thread engagement through partially threaded design preventing over-tightening and material stress
• Industry-standard compliance meeting ASME B18.6.3 specifications for dimensional accuracy and interchangeability
• Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated industries

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 10-24 UNC flat head screws solve critical fastening challenges where corrosion resistance and structural integrity are paramount. The 18-8 stainless steel composition combined with passivated finish provides exceptional protection against chemical exposure and atmospheric corrosion, making them ideal for marine, food processing, and chemical plant equipment. The partially threaded design with Class 2A thread fit ensures precise clamping force distribution while preventing thread stripping in softer materials. The 82° countersink angle and flat head profile facilitate flush installation in machinery housings, conveyor systems, and structural assemblies where protruding fasteners would interfere with operation. With 80,000 psi tensile strength, these screws maintain joint integrity under dynamic loads and vibration, reducing maintenance frequency in automotive, aerospace, and heavy equipment applications.

Specification Summary & Compliance

This 2-1/4" flat head screw features precise 10-24 UNC coarse threads with Class 2A thread fit tolerance for consistent engagement. Manufacturing complies with ASME B18.6.3 standards for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety, ensuring environmental responsibility throughout the supply chain.