S-91781A163 6-32 x 3" 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, ensuring long-lasting performance in harsh environments
• Excellent tensile strength of 80,000 psi provides reliable fastening for demanding industrial applications
• Precise flush mounting with standard 82° countersink angle and flat head design for seamless surface integration
• Optimized thread engagement through UNC coarse threading and Class 2A fit ensures secure installation and vibration resistance
• Enhanced durability with Rockwell B80 hardness maintaining structural integrity under repeated stress
• Regulatory compliance with ASME B18.6.3 standards and environmental regulations (RoHS 3, REACH) for worry-free global sourcing
• Versatile partial threading allows for both secure clamping and adjustable positioning in assembly operations

Professional Applications & Engineering Value

This 6-32 UNC flat head screw delivers exceptional engineering value across industrial applications where corrosion resistance and structural integrity are paramount. The 18-8 stainless steel composition, enhanced by passivated finish, provides critical protection against chemical exposure and atmospheric corrosion in manufacturing equipment, marine hardware, and food processing machinery. The coarse UNC threading combined with Class 2A thread fit ensures rapid installation and maintains clamping force in high-vibration environments, while the partially threaded design allows precise adjustment in assembly jigs and fixtures. The standardized 82° countersink angle guarantees flush mounting in precision-machined components, eliminating protrusions that could interfere with moving parts or safety protocols.

Specification Summary & Compliance

This 3" flat head screw features precise dimensional control with Class 2A thread fit per UNC standards and 0.262" head diameter specifications. Manufacturing complies with ASME B18.6.3 mechanical standards, ensuring interchangeability and reliability. Environmental compliance is verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) certifications, confirming the absence of restricted substances for global industrial applications.