S-90128A110 4-40 x 1/2" 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 plating, extending service life in demanding industrial environments
- Exceptional tensile strength of 170,000 psi for reliable performance under high-stress applications
- Precise Class 3A thread fit ensures smooth installation and secure fastening with minimal play
- Hex socket drive design allows for high-torque application and easy access in confined spaces
- Rockwell C37 hardness rating provides excellent wear resistance and durability
- Fully threaded right-hand coarse UNC design offers quick assembly and strong holding power
- Compliance with multiple industry standards including ASTM A574 for guaranteed quality and reliability
Professional Applications & Engineering Value
These 4-40 UNC socket head cap screws deliver critical performance advantages in precision engineering applications where space constraints and vibration resistance are paramount. The zinc-plated alloy steel construction provides essential corrosion protection for machinery, automotive components, and electronic enclosures exposed to harsh conditions. The hex drive socket and Class 3A thread fit enable precise torque control during installation, preventing stripping and ensuring consistent clamping force. With 170,000 psi tensile strength and Rockwell C37 hardness, these fasteners maintain integrity in high-vibration environments, reducing maintenance frequency and downtime in industrial assembly lines, robotics, and precision equipment manufacturing.
Specification Summary & Compliance
This socket head cap screw features precise 4-40 UNC coarse threads with Class 3A fit for superior dimensional accuracy. Manufactured to ASTM A574 specification for alloy steel socket head cap screws, ensuring consistent quality and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making them suitable for global industrial applications requiring restricted substance compliance.
