S-90128A369 1/4"-28 x 7/8" 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
- Exceptional tensile strength of 170,000 PSI ensures reliable performance under high-stress conditions
- Superior corrosion resistance with zinc-plated alloy steel construction for extended service life in harsh environments
- Precise Class 3A thread fit guarantees secure fastening with minimal backlash in critical assemblies
- Fine UNF thread profile provides enhanced vibration resistance and superior clamping force distribution
- Hex socket drive design allows for high-torque installation in confined spaces with standard tools
- Full-threaded length enables maximum thread engagement and adjustable positioning flexibility
- Industry compliance with ASTM A574 ensures consistent quality and mechanical properties
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these socket head cap screws deliver exceptional performance where reliability is paramount. The zinc-plated alloy steel construction provides superior corrosion protection while maintaining Rockwell C37 hardness for excellent wear resistance. The Class 3A UNF fine threads offer precise fitment critical in vibration-prone environments such as machinery, automotive assemblies, and precision equipment. The hex socket drive enables high-torque installation without stripping, while the fully threaded design ensures maximum engagement in tapped holes. These fasteners solve common engineering challenges by combining high tensile strength with corrosion resistance, making them ideal for applications requiring both mechanical integrity and environmental durability.
Specification Summary & Compliance
This 1/4"-28 UNF socket head cap screw features precise Class 3A thread fit with fine thread spacing for superior clamping performance. Manufactured to ASTM A574 specifications with consistent dimensional accuracy. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. The combination of alloy steel material with zinc plating provides optimal corrosion protection while maintaining the specified mechanical properties including 170,000 PSI tensile strength and Rockwell C37 hardness.
