S-91771A099 3-48 x 3/4" 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 for extended service life in demanding environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for reliable performance under high stress
• Precision flush mounting enabled by the 82° countersink angle and flat head design for seamless surface integration
• Enhanced driving efficiency with Phillips No. 1 drive that provides secure torque transmission and reduces cam-out
• Reliable thread engagement through Class 2A thread fit and coarse UNC threading for quick assembly and vibration resistance
• Full thread coverage along the entire 3/4" length for maximum holding power and adjustment flexibility
• Industry compliance assurance meeting ASME B18.6.3 specifications for dimensional accuracy and performance reliability

Professional Applications & Engineering Value

These 3-48 UNC flat head Phillips screws deliver critical engineering solutions where surface flushness and corrosion resistance are paramount. The passivated 18-8 stainless steel construction provides exceptional protection against oxidation and chemical exposure, making them ideal for industrial equipment, electronic enclosures, and marine applications. The fully threaded design ensures maximum grip length while the 82° countersink angle creates a seamless finish that eliminates protrusions and snag hazards. With coarse thread spacing and Class 2A thread fit, these fasteners offer rapid installation and maintain secure connections even in high-vibration environments, reducing maintenance frequency and improving operational reliability across various industrial sectors.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread specifications ensuring consistent performance. These flat head screws comply with ASME B18.6.3 mechanical and dimensional requirements, providing guaranteed interchangeability and reliability. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming they are free from restricted substances and suitable for global industrial applications requiring stringent environmental standards.