S-90471A447 1/4"-20 x 2" ASME B18.6.3 Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in harsh environments
• High mechanical strength with 60,000 psi tensile strength and Rockwell B70 hardness to withstand demanding loads
• Reliable thread engagement with Class 2A UNC coarse threads ensuring secure fastening and vibration resistance
• Efficient installation with standard flat head profile and No. 3 Phillips drive for flush mounting and easy driving
• Full thread coverage along the 2" length provides maximum grip strength in various material thicknesses
• Industry compliance meeting ASME B18.6.3 specifications for consistent quality and dimensional accuracy
• Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated applications

Professional Applications & Engineering Value

These zinc-plated steel flat head screws deliver exceptional performance in industrial and construction applications where corrosion resistance and mechanical reliability are paramount. The combination of 60,000 psi tensile strength and Rockwell B70 hardness ensures these UNC coarse thread screws maintain integrity under substantial stress, while the zinc plating provides critical protection against environmental degradation. The standard flat head profile with 100° countersink angle allows for flush mounting in predrilled holes, making them ideal for machinery assembly, metal framing, and equipment manufacturing where surface smoothness and secure fastening are essential. The fully threaded design and Class 2A thread fit guarantee consistent engagement across various material thicknesses, reducing installation time and improving joint reliability.

Specification Summary & Compliance

This 1/4"-20 x 2" flat head Phillips screw features precision UNC coarse threads with Class 2A thread fit tolerance for reliable engagement. Manufactured to ASME B18.6.3 specifications ensuring dimensional accuracy and performance consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for use in regulated industries and international markets.