S-90128A846 1/2"-20 x 1 3/4" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket Head 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 alloy steel construction, extending service life in harsh industrial environments
- Precise torque transmission through 3/8" hex drive design, minimizing tool slippage and ensuring secure fastening
- Exceptional load-bearing capacity with 170,000 psi tensile strength and Rockwell C37 hardness for high-stress applications
- Reliable thread engagement with Class 3A fine UNF threads, providing vibration resistance and superior clamping force
- Full-threaded design for maximum grip length and uniform stress distribution across the entire fastener
- Industry-standard compliance meeting ASTM A574 specifications for consistent quality and performance
- Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated industries
Professional Applications & Engineering Value
This zinc-plated alloy steel socket head cap screw delivers critical performance advantages for demanding industrial applications. The combination of 170,000 psi tensile strength and Class 3A UNF fine threads provides exceptional resistance to vibration loosening in machinery, automotive assemblies, and heavy equipment. The 3/8" hex drive allows for high-torque installation in confined spaces, while the zinc plating offers reliable corrosion protection in environments exposed to moisture and chemicals. Engineered to ASTM A574 standards, these socket head cap screws maintain dimensional stability under extreme loads, making them ideal for precision engineering applications where fastener failure is not an option.
Specification Summary & Compliance
Manufactured to exacting Class 3A thread fit tolerances with 1/2"-20 UNF fine threads and right-hand thread direction. The fastener features a standard socket head profile with 3/4" head diameter and 1 3/4" fully threaded length. Compliant with ASTM A574 manufacturing specifications, RoHS 3 (2015/863/EU) environmental directives, and REACH (EC 1907/2006) chemical regulations for industrial use.
