S-91440A638 3/8"-16 x 5" ASME B18.6.3 Steel Round Head Combination Phillips/Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Exceptional holding power provided by UNC coarse threading and full threading along the entire 5" length
• Versatile installation options with combined Phillips/Slotted drive (No. 4 size) for flexible tool compatibility
• Precise thread engagement ensured by Class 2A thread fit for reliable fastening performance
• Optimized head design with rounded profile for reduced surface marring and improved aesthetics
• Industry-standard compliance meeting ASME B18.6.3 specifications for consistent quality and performance
• Environmental responsibility with RoHS 3 and REACH compliance for sustainable manufacturing practices

Professional Applications & Engineering Value

These zinc-plated steel rounded head screws deliver exceptional engineering value across industrial and commercial applications. The combination of UNC coarse threading and fully threaded design provides superior pull-out resistance in wood, metal, and composite materials, making them ideal for construction, machinery assembly, and heavy equipment applications. The Phillips/Slotted drive system offers installation flexibility while the zinc plating creates a protective barrier against corrosion in humid or outdoor environments. The rounded head profile minimizes surface damage while providing ample bearing surface for secure fastening. These 5-inch industrial screws are engineered to maintain integrity under vibration and load stress, ensuring long-term reliability in demanding fastening scenarios.

Specification Summary & Compliance

This 3/8"-16 x 5" rounded head screw features precise Class 2A thread fit with UNC coarse thread specification (16 threads per inch) and right-hand threading. Manufactured to ASME B18.6.3 standards for dimensional accuracy and performance reliability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe and sustainable manufacturing practices. The product maintains consistent thread diameter of 0.375" with standard rounded head profile (0.708" diameter, 0.256" height) for uniform performance across applications.