S-91440A620 3/8"-16 x 4" ASME B18.6.3 Steel Round Head Combination Phillips/Slotted Screws
Steel Round Head Combination Phillips/Slotted Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments.
- High tensile strength of 60,000 psi ensures reliable fastening under heavy loads, reducing the risk of mechanical failure.
- Rockwell B70 hardness provides excellent durability and resistance to wear during installation and use.
- Dual Phillips/Slotted drive (No. 4) offers versatile installation options with common tools, improving assembly efficiency.
- Fully threaded UNC coarse spacing enables faster driving and secure holding power in various materials.
- Class 2A thread fit ensures consistent, precise engagement for reliable performance and ease of use.
- Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees adherence to industry standards and environmental safety regulations.
Professional Applications & Engineering Value
This 3/8"-16 x 4" zinc-plated steel rounded head screw is engineered to address common industrial challenges such as vibration loosening and corrosion in harsh conditions. The zinc-plated steel material offers a protective barrier against moisture and chemicals, while the UNC coarse thread and fully threaded design provide rapid installation and strong grip in wood, metal, and composite assemblies. Ideal for machinery, construction, and automotive applications, it combines high tensile strength and Rockwell B70 hardness to withstand dynamic stresses, ensuring long-term reliability. The rounded head with Phillips/Slotted drive allows for flush mounting and easy access, reducing assembly time and improving operational efficiency in B2B settings.
Specification Summary & Compliance
This screw features precise Class 2A thread fit and UNC coarse thread with a diameter of 0.375" and length of 4", manufactured to ASME B18.6.3 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industry-standard quality for reliable performance in professional applications.
