S-90128A136 5/16"-18 x 3/8" 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
- Superior corrosion resistance with zinc-plated alloy steel construction for extended service life in harsh environments
- Exceptional load-bearing capability with 170,000 psi tensile strength for demanding industrial applications
- Precise thread engagement with Class 3A fit ensuring reliable fastening and vibration resistance
- Optimized torque transmission through 1/4" hex drive design for secure installation without stripping
- Enhanced durability with Rockwell C37 hardness maintaining structural integrity under repeated stress
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for global market acceptance
- Versatile coarse thread design with UNC 5/16"-18 threads providing rapid assembly in various materials
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this socket head cap screw delivers critical performance where precision fastening matters most. The zinc-plated alloy steel construction provides essential corrosion protection for machinery, automotive assemblies, and manufacturing equipment exposed to operational stresses. With fully threaded UNC coarse threads and Class 3A thread fit, installation becomes consistently reliable while minimizing cross-threading risks. The standard socket head profile with 1/4" hex drive ensures maximum torque transfer in confined spaces where wrench clearance is limited. These industrial screws maintain clamping force integrity even under extreme vibration, making them ideal for high-stress connections in production equipment, hydraulic systems, and structural frameworks requiring 170,000 psi tensile strength reliability.
Specification Summary & Compliance
This 5/16"-18 UNC socket head cap screw features precision Class 3A thread fit with right-hand coarse threads and complies with ASTM A574 manufacturing specifications. The fastener maintains dimensional accuracy with 0.3125" thread diameter and 3/8" length tolerance. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring suitability for international industrial markets and restricted substance requirements.
