S-91771A091 3-48 x 3/16" 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
• High tensile strength of 80,000 psi ensures reliable fastening under demanding mechanical loads
• Precise Class 2A thread fit guarantees smooth installation and secure connections in assembly operations
• Fully threaded UNC coarse design provides maximum grip and faster installation in various materials
• Standard 82° countersink angle enables flush mounting for clean, professional finishes
• Phillips #1 drive compatibility offers widespread tool accessibility and efficient torque transfer
• Comprehensive regulatory compliance meets ASME B18.6.3, RoHS 3, and REACH standards for global industrial use

Professional Applications & Engineering Value

These 3-48 UNC flat head screws deliver exceptional engineering value in industrial fastening applications where corrosion resistance and mechanical reliability are paramount. The passivated 18-8 stainless steel construction provides superior protection against oxidation and chemical exposure, making them ideal for machinery, electronic enclosures, and outdoor equipment. The coarse UNC thread ensures rapid installation and secure holding power in metals, plastics, and composite materials, while the standard 82° countersink angle creates seamless, flush surfaces that prevent snagging and improve aesthetic appeal. With fully threaded design and Class 2A thread fit, these screws maintain consistent engagement depth and eliminate loosening in high-vibration environments, solving critical fastening challenges across manufacturing, automotive, and electrical industries.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread specifications ensuring consistent performance. Complies with ASME B18.6.3 mechanical standards for dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for hazardous substance restrictions, confirming suitability for global industrial markets and environmentally conscious manufacturing operations.