S-91771A842 10-32 x 3" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ensuring long-term reliability in harsh environments.
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for demanding load-bearing applications.
• Precision thread engagement with Class 2A fit and 10-32 UNF fine threads, providing secure, vibration-resistant fastening.
• Optimized flush mounting featuring a standard flat head with 82° countersink angle for seamless, professional-grade installations.
• Enhanced drive stability with Phillips No. 2 drive, reducing cam-out and ensuring efficient installation.
• Reliable partial threading on a 3" length, allowing for controlled clamping force and material flexibility.
• Full regulatory compliance meeting ASME B18.6.3 specifications, RoHS 3, and REACH standards for global industrial use.

Professional Applications & Engineering Value

Engineered for precision assemblies requiring flush surface finishes and high tensile strength, these 10-32 UNF flat head screws solve critical challenges in machinery, electronics, and structural frameworks. The passivated 18-8 stainless steel provides excellent resistance to oxidation and chemical exposure, extending service life in demanding conditions like marine or outdoor equipment. With fine thread spacing and Class 2A thread fit, these screws ensure tight, secure connections that resist loosening under vibration—ideal for aerospace components, automotive subsystems, and industrial enclosures. The partially threaded design allows precise control over joint compression, while the Phillips drive facilitates quick, reliable installations with standard tools.

Specification Summary & Compliance

This product adheres to Class 2A thread fit tolerances per UNF standards, ensuring dimensional accuracy and interchangeability. Manufacturing complies with ASME B18.6.3 for mechanical and dimensional consistency. Environmental and safety regulations are fully met, including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming the absence of restricted hazardous substances. The 82° countersink angle and right-hand thread direction align with industry norms for flat head fasteners.