S-91771A144 6-32 x 1/4" 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, ideal for harsh industrial environments
• Exceptional mechanical strength with 80,000 PSI tensile strength and Rockwell B80 hardness for reliable load-bearing performance
• Precision thread engagement through Class 2A thread fit and UNC coarse threading, ensuring secure fastening and vibration resistance
• Efficient installation with No. 2 Phillips drive and standard 82° countersink angle for flush mounting and reduced assembly time
• Full-threaded design provides maximum grip length and uniform stress distribution across connected materials
• Regulatory compliance with ASME B18.6.3 standards, RoHS 3, and REACH for safe use in regulated industries
• Versatile right-hand threading compatible with standard UNC 6-32 nuts and components for broad application compatibility

Professional Applications & Engineering Value

These 6-32 UNC flat head Phillips screws deliver critical engineering advantages in demanding applications. The passivated 18-8 stainless steel construction provides excellent resistance to oxidation and chemical exposure, making them suitable for electronics enclosures, machinery panels, and outdoor equipment where environmental durability is paramount. The flat head profile with 82° countersink enables seamless flush mounting that prevents snagging while maintaining structural integrity. With 80,000 PSI tensile strength and Class 2A thread fit, these screws maintain clamping force under dynamic loads and vibration, solving common loosening issues in automotive, aerospace, and industrial assembly. The combination of coarse threading and full threading ensures rapid installation and superior pull-out resistance in both metallic and composite materials.

Specification Summary & Compliance

Manufactured to ASME B18.6.3 specifications with Class 2A thread fit tolerance for consistent mating with standard UNC 6-32 components. The 1/4" length and 0.262" head diameter maintain dimensional accuracy for precise countersinking. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability. Threading conforms to UNC coarse thread standards with right-hand direction and full threading from point to head.