S-92224A120 4-40 x 3/4" ASME B18.6.3 Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black oxide steel construction for reliable performance in demanding industrial environments
• Superior driving efficiency with No. 1 Phillips drive design that minimizes cam-out and reduces tool wear during installation
• Optimized thread engagement through 4-40 UNC coarse threading with Class 2A fit ensuring secure fastening and vibration resistance
• Maximum load distribution from the rounded pan head design that provides excellent bearing surface without damaging materials
• Exceptional mechanical strength with 60,000 psi tensile strength and Rockwell B70 hardness for heavy-duty applications
• Complete thread coverage with fully threaded 3/4" length offering versatile fastening solutions across various material thicknesses
• Regulatory compliance assurance meeting ASME B18.6.3 standards and environmental regulations for global industrial use

Professional Applications & Engineering Value

These 4-40 UNC coarse thread screws with black oxide steel construction deliver exceptional performance in industrial assembly applications where corrosion resistance and mechanical reliability are critical. The rounded pan head design distributes clamping force evenly, preventing surface damage while the No. 1 Phillips drive ensures efficient installation with reduced operator fatigue. Engineered with Class 2A thread fit and fully threaded design, these screws maintain consistent engagement across various material thicknesses, solving common challenges of loose fasteners in vibrating environments. The combination of 60,000 psi tensile strength and Rockwell B70 hardness makes them ideal for machinery, electronics, and equipment manufacturing where structural integrity is paramount.

Specification Summary & Compliance

Manufactured to precise inch system dimensions with Class 2A thread fit tolerance ensuring consistent performance across industrial applications. These 4-40 UNC coarse thread screws comply with ASME B18.6.3 manufacturing specifications and meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for safe use in global markets. The right-hand threaded design with standard pan head profile maintains industry-standard compatibility while the black oxide surface treatment provides additional corrosion protection in demanding operating conditions.