S-90128A842 1/2"-20 x 1 1/4" 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 for extended service life in demanding environments
- Exceptional mechanical strength with 170,000 PSI tensile strength and Rockwell C37 hardness for high-stress applications
- Precision fastening capability through Class 3A fine thread fit ensuring secure, vibration-resistant connections
- Optimized torque transmission with 3/8" hex drive and standard socket head profile for efficient installation
- Full-thread engagement design maximizing grip strength and load distribution across the entire fastener length
- Regulatory compliance assurance meeting ASTM A574, RoHS 3, and REACH standards for global industrial acceptance
- Fine thread advantage providing better adjustment precision and superior performance in high-vibration applications
Professional Applications & Engineering Value
Engineered for high-performance industrial fastening, these zinc-plated alloy steel socket head cap screws deliver critical reliability in machinery assembly, automotive components, and heavy equipment manufacturing. The 1/2"-20 UNF fine thread configuration with Class 3A thread fit addresses common vibration-induced loosening issues while maintaining precise alignment in critical joints. The combination of 170,000 PSI tensile strength and Rockwell C37 hardness ensures these socket head screws withstand extreme mechanical stresses without compromising structural integrity. The standard socket head profile with 3/8" hex drive facilitates installation in confined spaces while providing maximum torque transfer efficiency for production line applications.
Specification Summary & Compliance
Manufactured to ASTM A574 specifications with precision Class 3A thread fit and UNF fine thread standards. Features include 1/2"-20 thread size, 1-1/4" length, and fully threaded design. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
