S-90128A595 5/16"-18 x 3" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional tensile strength of 170,000 PSI for reliable performance in high-stress applications, reducing the risk of fastener failure.
- Superior corrosion resistance with zinc-plated alloy steel construction, extending service life in harsh industrial environments.
- Precise Class 3A thread fit ensures secure, vibration-resistant assemblies with minimal risk of loosening.
- High hardness rating (Rockwell C37) provides excellent wear resistance and durability under repeated use.
- Convenient 1/4" hex drive allows for easy installation and removal with standard tools, speeding up assembly processes.
- Partially threaded design with a minimum 1-3/8" thread length offers optimal grip and clamping force in varied material thicknesses.
- Compliance with ASTM A574, RoHS 3, and REACH standards guarantees material quality and environmental safety for global supply chains.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, this 5/16"-18 UNC socket head cap screw delivers robust fastening solutions where reliability is critical. The zinc-plated alloy steel material combats corrosion in outdoor or chemically exposed environments, while the coarse thread design ensures quick assembly and superior holding power in soft materials or high-vibration machinery. Its partially threaded configuration provides focused clamping force, minimizing stress concentration and preventing joint failure in heavy-duty equipment, automotive assemblies, and construction frameworks. With a 1/4" hex drive, it enables efficient torque application in confined spaces, reducing installation time and labor costs for maintenance teams and production lines.
Specification Summary & Compliance
This socket head cap screw adheres to Class 3A thread tolerances for precise fit and UNC coarse thread standards (5/16"-18) in the inch system. It meets ASTM A574 manufacturing specifications for quality assurance and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for industrial use.
